Which STDs cause which symptoms — the questions people actually search.
124 articles
A new genital rash usually isn't herpes or any STD — contact dermatitis from latex condoms, soap, lube, or laundry detergent is a far more common cause. Contact dermatitis is an itchy, red, often symm
Anal warts and hemorrhoids both show up as bumps near the anus, but they're entirely different problems. Anal warts are caused by HPV, a sexually transmitted virus, and usually feel like small, firm,
Genital warts are caused by HPV and look like small flesh-colored bumps or a cauliflower-like cluster that can appear singly or in groups. Skin tags are soft, dangling, non-viral flaps of normal skin.
A penile rash that itches, burns, or blisters is most often one of three things: a yeast infection (Candida overgrowth on the glans), genital herpes (an HSV viral infection), or balanitis (general inf
Clear or watery genital discharge is often normal — physiological fluid and ovulation produce thin, clear mucus in healthy people. But the same look can come from early chlamydia , gonorrhea , or tric
Thick, white, cottage-cheese-like discharge is most often a vaginal yeast infection — a fungal overgrowth of Candida , not an STI. True STIs usually look different: bacterial vaginosis runs thin and g
Yes, certain STIs can cause frequent or urgent urination — most often chlamydia, gonorrhea, and trichomoniasis when they inflame the urethra. But the same symptom comes from non-STI causes like a urin
Genital blisters — small, fluid-filled bumps that often break into painful sores — are most commonly caused by genital herpes, the leading STI behind this symptom. But not every blister is an infectio
Green or yellow-green discharge most often points to a sexually transmitted infection — usually gonorrhea or trichomoniasis , and sometimes chlamydia. Non-STI causes like bacterial vaginosis or a yeas
Yes — you can absolutely have hepatitis B or C and feel completely fine. Both infect the liver, both spread through blood and (for hepatitis B) sex, and both are frequently silent. Many people with he
That tingling, itching, or burning before a herpes outbreak is called the prodrome — an early warning the virus is reactivating along a nerve before any blister appears. It usually shows up in the sam
An itchy or uncomfortable anus is far more often a benign skin problem than a sexually transmitted infection. The usual culprits are hemorrhoids, anal fissures, and pinworm. But a handful of STIs — ge
Mpox symptoms usually start within 3 to 17 days of exposure, and almost everyone who gets sick does so within 21 days of contact CDC, signs & symptoms. The illness typically runs 2 to 4 weeks. The hal
A painful lump in the groin is most often a swollen lymph node reacting to an infection nearby — and a few sexually transmitted infections, chiefly genital herpes and syphilis, can trigger that swelli
A painful genital ulcer usually points to genital herpes or chancroid, while a painless one is the classic sign of primary syphilis. But pain is only the first clue — herpes, syphilis, and chancroid o
A painless sore or ulcer on the penis or vagina is most often the chancre of primary syphilis — a single, firm, round, painless sore at the spot where the bacterium entered. Other causes include minor
Pus or thick, cloudy discharge from the penis is almost always a sign of urethritis — inflammation of the urethra — and the usual culprits are sexually transmitted infections: gonorrhea, chlamydia, or
Penile symptoms — discharge, burning when you pee, sores, itching, or rash — are most often caused by chlamydia, gonorrhea, nongonococcal urethritis (NGU), genital herpes, or syphilis. Non-STI causes
Redness or inflammation on the penis head most often comes from balanitis — irritation of the glans triggered by soap, sweat, or a yeast overgrowth — and far less often from an STI like gonorrhea, chl
A sore throat after oral sex can be a routine viral or strep infection — or it can be an STI you picked up through the mouth. Throat (pharyngeal) gonorrhea is the most common STI culprit and often cau
Light bleeding or spotting after sex can be caused by several sexually transmitted infections — most often chlamydia, gonorrhea, and trichomoniasis — but it also has common non-STI causes like cervica
A burning sensation without obvious discharge can still point to a sexually transmitted infection. The most common STI culprits are chlamydia, genital herpes, and Mycoplasma genitalium, each of which
Bleeding between periods or after sex can be a sign of an STI — most often chlamydia, gonorrhea, or trichomoniasis , which inflame the cervix and make it bleed easily. But hormonal birth control, fibr
Several sexually transmitted infections can cause anal or rectal symptoms — most commonly gonorrhea, chlamydia, genital herpes, and syphilis . They show up as rectal pain, itching, discharge, bleeding
An unusual genital discharge most often points to one of a handful of causes: chlamydia, gonorrhea, trichomoniasis, or bacterial vaginosis (BV) — plus common non-STI culprits like yeast infections and
The STIs most likely to cause flu-like symptoms — fever, fatigue, body aches, swollen glands — are HIV, syphilis, hepatitis B, and hepatitis C . Each tends to show up weeks after exposure, not days. B
Genital bumps or lumps are most often caused by one of three STIs — HPV (genital warts), molluscum contagiosum, or genital herpes — but many harmless, non-STI conditions look nearly identical. Because
Several STIs can make you itch down there — genital herpes, trichomoniasis, pubic lice (crabs), and scabies are the usual culprits. But itching is just as often something else entirely: a yeast infect
A handful of sexually transmitted infections can cause joint pain or swelling. The most important are gonorrhea (which can spread to the joints and cause disseminated gonococcal infection), chlamydia
Lower back pain by itself is almost never an STI — it's usually a muscle or joint problem. The one sexually transmitted condition that genuinely refers pain to the lower back is pelvic inflammatory di
Mouth or throat symptoms after oral sex can come from a handful of sexually transmitted infections — most often gonorrhea, syphilis, and herpes, with chlamydia possible but usually silent. They overla
Pain during sex (dyspareunia) can be an STI symptom — the usual infectious culprits are pelvic inflammatory disease (PID), genital herpes, and trichomoniasis. But many cases aren't an STI at all: vagi
Lower-abdominal or pelvic pain that traces back to a sexually transmitted infection is most often a sign of pelvic inflammatory disease (PID), usually driven by untreated chlamydia or gonorrhea . But
A skin rash linked to a sexually transmitted infection is most often caused by one of three culprits: syphilis , HIV , or mpox . A rough rash on the palms and soles strongly suggests secondary syphili
Genital sores or ulcers most often come from one of three sexually transmitted infections: genital herpes and chancroid, which usually hurt, and syphilis, whose sore is classically painless. Friction,
Swollen lymph nodes in the groin can be a sign of an STI, most often genital herpes (especially a first outbreak), syphilis , or recently acquired HIV . But many groin swellings come from ordinary ski
Testicular or scrotal pain is most often not an STI — but two bacterial infections, chlamydia and gonorrhea , can cause it by inflaming the tube behind the testicle (epididymitis). The catch: the same
A strong, fish-like vaginal odor most often points to bacterial vaginosis (BV) or the STI trichomoniasis , both caused by a shift in vaginal microbes. A forgotten tampon and normal scent changes can d
STI symptoms in teens most often come from chlamydia, gonorrhea, genital herpes, or HPV — but normal puberty, acne, and non-STI discharge can look identical. Because many of these infections cause no
If your symptoms could be either an STI or menopause, the most likely culprits are vaginal dryness and irritation from falling estrogen, or one of three often-silent STIs — chlamydia, gonorrhea, or tr
Swollen lymph nodes in the groin from an STI most often point to genital herpes, syphilis, or early HIV — all of which can cause tender or swollen glands as the immune system reacts to infection. But
A swollen testicle on one side has several possible causes, and not all are sexually transmitted. STIs like chlamydia and gonorrhea can inflame the tube behind the testicle and cause one-sided pain or
If you're on testosterone and have new vaginal (front-hole) discharge, burning, odor, or bleeding, the likely culprits are chlamydia, gonorrhea, bacterial vaginosis, or testosterone-related atrophy. T
Vaginal or vulvar symptoms — discharge, itching, odor, burning, or pain — most often trace back to one of a handful of causes: the STIs chlamydia, gonorrhea, and trichomoniasis, and the non-STI condit
White spots or patches on the genitals most often come from harmless normal anatomy — Fordyce spots and pearly penile papules — or from two common infections, genital warts (HPV) and molluscum contagi
Yellow discharge from the vagina or penis is most often caused by a sexually transmitted infection — gonorrhea, chlamydia, or trichomoniasis — but a yeast infection or normal mid-cycle discharge can a
Syphilis moves through four stages. The primary stage brings a painless sore (chancre) at the infection site about three weeks after exposure. The secondary stage adds a body rash, often on the palms
Syphilis, herpes, and chancroid all cause genital sores, but the classic split is pain and depth: a syphilis chancre is a single firm, painless ulcer; herpes makes clusters of small painful blisters t
Trichomoniasis symptoms, when they show up, include vaginal itching, burning, soreness, painful urination, and a clear, white, yellowish or greenish discharge with a fishy odor in women; men may notic
A yeast infection brings diffuse itching, burning, and a thick white discharge across the whole vulva, while genital herpes typically causes a cluster of painful blisters or sores in one spot. Yeast i
Folliculitis, herpes, and genital warts can all show up as bumps below the belt, but they're caused by completely different things: folliculitis is an inflamed or infected hair follicle, genital herpe
Nongonococcal urethritis (NGU) in men usually shows up as a thin, clear or cloudy (mucoid) discharge, burning or pain during urination, and an itchy or tingling feeling inside the tip of the penis. Ma
Vaginal itching, burning, and discharge get blamed on yeast more than anything else — but yeast is just one of several causes, and the others can look almost identical. The likeliest culprits are a va
Bleeding between periods can be an early sign of a sexually transmitted infection — most often chlamydia or gonorrhea , which inflame the cervix and make it bleed easily, especially after sex. But spo
White spots or patches on the penis are most often not caused by an STI. The two harmless look-alikes — Fordyce spots and pearly penile papules — are normal anatomy. When an infection is the cause, th
The STIs most likely to affect male fertility are chlamydia, gonorrhea, and Mycoplasma genitalium — all bacterial infections that can inflame the urethra and the tube behind the testicle. Each is ofte
A vaginal yeast infection and a urinary tract infection feel different at their core: yeast brings external itching, soreness, and a thick white discharge, while a UTI brings internal burning with urg
Genital herpes usually shows up as a tight cluster of small blisters that burn or sting, break open into raw sores, then crust over and heal in a week or more — and tend to come back in the same spot.
Razor burn shows up within a day of shaving as a patch of diffuse redness and tiny irritation bumps that fade in a day or two. Genital herpes tends to start as a tight cluster of small blisters that b
Mpox symptoms center on a rash that looks like pimples or blisters — often painful or itchy — that can show up on the genitals, anus, mouth, hands, feet, or face. Since 2022, many people get just one
Burning when you pee, urgency, and that nagging pressure can come from a urinary tract infection — but the same feelings are classic early signs of chlamydia, gonorrhea, and trichomoniasis. A true UTI
The main STI that causes true fluid-filled blisters on the genitals is genital herpes (HSV-1 or HSV-2), which appears as clusters of small blisters that break open into painful sores. Other causes are
Testicular pain in men can come from a sexually transmitted infection, but it often doesn't. The STIs most likely to cause it are chlamydia and gonorrhea, which inflame the epididymis (the coiled tube
A fishy vaginal odor — especially one that gets stronger after sex — most often points to bacterial vaginosis (BV) or the STI trichomoniasis . BV isn't sexually transmitted, but trich is. A yeast infe
Several STIs can change the color of genital discharge, but no color reliably points to one infection. Gonorrhea tends toward yellow, white, or green discharge; chlamydia toward thin or cloudy fluid;
Blood in the urine (hematuria) is rarely a classic STI symptom, but two bacterial infections — chlamydia and gonorrhea — can inflame the urethra enough to tint urine pink or red. More often, blood poi
Three sexually transmitted infections most often cause frequent or burning urination: chlamydia, gonorrhea, and trichomoniasis. Each can inflame the urethra and trigger urgency, painful urination, or
The short answer: no STI directly shrinks the testicle on its own, but two common bacterial STIs — chlamydia and gonorrhea — can inflame the epididymis and testicle, and severe or untreated inflammati
Hepatitis A is an acute viral liver infection that, when it causes symptoms at all, brings fatigue, nausea, abdominal pain, jaundice, dark urine, and pale stools — usually starting 2 to 7 weeks after
Hepatitis B often causes no symptoms at all. When it does, acute illness can bring fatigue, fever, poor appetite, nausea, belly pain, joint pain, dark urine, pale stools, and yellowing of the skin or
Hepatitis C usually causes no symptoms at all. When symptoms do show up, they're vague and easy to miss — fatigue, poor appetite, belly pain, or dark urine — and jaundice (yellowing of the skin and ey
Two of the most common causes of an unusual vaginal discharge are a yeast infection and bacterial vaginosis (BV). The quick tell: yeast tends to bring thick, white, odorless discharge with itching, wh
Lower-abdominal or pelvic pain from a sexually transmitted infection usually means the infection has moved up into the reproductive organs. The most likely STI cause is pelvic inflammatory disease (PI
Several STIs can cause vulvar itching, sores, or swelling — most often genital herpes (painful blisters and sores), trichomoniasis (itching with frothy discharge), and pubic lice (itching plus visible
A sore throat after oral sex can come from a sexually transmitted infection — most often pharyngeal gonorrhea , and sometimes chlamydia, syphilis, or herpes — but it can also be ordinary strep or a vi
Internal vaginal itching is most often caused by a vaginal yeast infection or bacterial vaginosis — neither of which is an STI — or by trichomoniasis, which is. Irritants, hormonal shifts, and dryness
Penile symptoms — discharge, burning when you pee, sores, or itching — most often point to chlamydia, gonorrhea, nongonococcal urethritis (NGU), genital herpes, or syphilis. But not every case is an S
Genital itching can be a sign of several sexually transmitted infections — most commonly genital herpes, trichomoniasis, pubic lice (crabs), and scabies. But it's just as often caused by non-STI probl
Pain during sex (dyspareunia) can be caused by several STIs — most commonly pelvic inflammatory disease (PID), genital herpes, and trichomoniasis. It also has many non-STI causes like vaginal dryness,
Nausea and vomiting are most often caused by ordinary, non-STI problems, but a few sexually transmitted infections can do it — chiefly the viral hepatitis infections (hepatitis A, B, and C) when they
Painful urination (dysuria) — a burning or stinging when you pee — is a classic sign of several sexually transmitted infections. The usual STI culprits are chlamydia, gonorrhea, and trichomoniasis, wi
A handful of sexually transmitted infections raise cancer risk, almost always by setting up a long, often silent infection that damages cells over years. The main culprits are HPV (cervical, anal, thr
Several STIs can start as a flu-like illness — fever, fatigue, aches, sore throat, and swollen glands. The main culprits are acute HIV, secondary syphilis, and hepatitis B and C. But ordinary colds an
Abnormal genital discharge is most often caused by a handful of treatable infections: chlamydia, gonorrhea, and trichomoniasis among the STIs, plus bacterial vaginosis (BV) and yeast infections, which
If you're staring at a new bump trying to decide herpes vs pimple, here's the quick read: a pimple is usually a single, pop-able whitehead that clears in a few days, while genital herpes tends to show
A painless sore or bump in the genital, anal, or oral area is most often the chancre of syphilis — a single firm, round, painless ulcer that appears about three weeks after exposure and heals on its o
Pelvic or lower-abdominal pain in women most often traces to one of three things: pelvic inflammatory disease (PID), a sexually transmitted infection of the upper reproductive organs; a urinary tract
Most mouth and lip sores fall into one of two buckets: an aphthous ulcer (canker sore), which is a shallow, non-contagious a crater inside the mouth, and a herpes cold sore, which is a contagious clus
Early warning signs of pelvic inflammatory disease (PID) include lower abdominal or pelvic pain, unusual discharge with a bad odor, fever, pain or bleeding during sex, burning with urination, and blee
Syphilis, herpes, and HPV can all show up as something on your skin down there, but they're caused by different organisms and behave very differently. A syphilis chancre is usually a single painless f
Three sexually transmitted infections cause most genital ulcers: genital herpes (HSV-1 or HSV-2), which makes clusters of small, painful blisters and sores; syphilis , which causes a single firm, pain
LGV symptoms most often show up as rectal trouble — mucoid or bloody discharge, anal pain, constipation, and a constant urge to pass stool (tenesmus) — or as tender, usually one-sided swelling of the
A sore throat tied to oral sex most often points to oral (pharyngeal) gonorrhea, oral chlamydia, or syphilis — three bacterial STIs that can infect the throat. But most sore throats aren't STIs at all
A few sexually transmitted infections show up on the skin, but the short list is small: syphilis (its classic rash on the palms and soles), acute HIV (a flu-like illness with a body rash), and mpox (p
Two sexually transmitted infections most often cause mouth or lip sores: genital herpes (HSV-1 or HSV-2), which produces small painful blisters that break into ulcers, and syphilis, which causes a sin
Genital swelling can be caused by a handful of STIs — most often genital herpes, chancroid, and lymphogranuloma venereum (LGV) — but plenty of non-STI problems like allergic reactions, cysts, and bloc
Genital pain can come from several sexually transmitted infections — most commonly genital herpes (painful blisters and sores), and less often chlamydia, gonorrhea, or trichomoniasis (which usually ca
Dry, flaky, or scaly skin is rarely caused by an STI. Far more often it's everyday dry skin, eczema, or psoriasis. Two STIs can affect the skin — HIV (in advanced disease) and secondary syphilis (a ro
Bruising and easy bleeding are almost never caused by an STI. The one real exception is HIV, which can lower your platelet count and lead to bruising — but that's a rare, late sign. Far more often, un
Swollen lymph nodes in the groin can be caused by several STIs — most commonly genital herpes and syphilis, plus the now-rare chancroid and early HIV. The key clue is the node's quality: tender, painf
Rectal bleeding can come from several sexually transmitted infections — most often gonorrhea, chlamydia, herpes, and syphilis when they infect the anus or rectum and cause proctitis (inflammation of t
A rash on the palms and soles is one of the most distinctive clues in medicine, and in sexual health it points hard to one cause: secondary syphilis. Most other rashes spare the palms and soles, so wh
A few sexually transmitted infections show up as an itchy rash in the pubic area, and the most likely culprits are pubic lice (crabs), scabies, and the rash of secondary syphilis. Plenty of non-STI co
The sexually transmitted infections most likely to cause pelvic pain in women are chlamydia and gonorrhea — usually because they've spread upward and triggered pelvic inflammatory disease (PID), an in
An itchy or scratchy throat after oral sex usually isn't an STI — but a handful can land in the mouth and throat. The ones to know are gonorrhea, syphilis, and oral herpes (HSV); chlamydia is possible
Lower back pain is rarely caused by an STI on its own, but untreated chlamydia or gonorrhea can climb into the pelvis and cause pelvic inflammatory disease (PID) , which often refers pain to the lower
A few sexually transmitted infections can trigger joint pain and swelling. The most important is gonorrhea, which can spread through the bloodstream and inflame joints directly; hepatitis B can cause
An itchy or painful anus can be caused by several STIs — most commonly genital herpes (painful sores), pubic lice or 'crabs' (intense itching), and rectal gonorrhea or chlamydia (often silent, sometim
Genital itching without discharge most often points to genital herpes, pubic lice (crabs), or scabies — the STIs that irritate skin rather than the urethra or vagina. Plenty of non-STI causes do the s
Genital sores or ulcers most often point to one of three sexually transmitted infections: genital herpes (HSV-1 or HSV-2), syphilis, and — rarely in the US — chancroid. The fastest clue is pain. Herpe
Several STIs can cause genital bumps or lumps — most commonly HPV (genital warts), molluscum contagiosum, and genital herpes. But plenty of harmless, non-STI conditions look almost identical: Fordyce
Red, goopy, or irritated eyes can come from a sexually transmitted infection — most often gonorrhea or chlamydia reaching the eye, and occasionally herpes. But ordinary viral or bacterial conjunctivit
Cloudy urine can be a sign of several sexually transmitted infections — most often chlamydia, gonorrhea, nongonococcal urethritis (NGU), and trichomoniasis. These cause inflammation in the urethra, an
Bleeding after sex (postcoital bleeding) can be caused by several STIs — most often chlamydia, gonorrhea, and trichomoniasis, which inflame the cervix and leave it fragile enough to bleed on contact.
Several STIs can cause anal or rectal symptoms — itching, pain, discharge, bleeding, or sores. The usual suspects are rectal gonorrhea, rectal chlamydia (including LGV), genital herpes, and syphilis.
A genital bump blamed on an ingrown hair is often exactly that — a single bump with a trapped hair that clears on its own. But the same spot can also be genital herpes, an HPV genital wart, or mollusc
STD symptoms in women most often come from chlamydia, gonorrhea, trichomoniasis, genital herpes, HPV, and bacterial vaginosis — but many of these infections cause no symptoms at all, and look-alikes l
STD symptoms in men most often include urethral discharge, burning when you pee, sores or blisters, warts or bumps, testicular pain, and skin rashes. But the biggest fact to know is that many STIs cau
After exposure, the timing of symptoms depends on the organism. Chlamydia tends to show up within one to three weeks, syphilis sores around three weeks, trichomoniasis anywhere from five to twenty-eig
If a groin rash itches more than it hurts and spreads outward in a ring with a clearer center, it's most likely jock itch (a fungal infection). If you see a tight cluster of small, painful blisters th
Granuloma inguinale (donovanosis) is a rare bacterial STI caused by Klebsiella granulomatis that produces painless, slowly enlarging, beefy-red genital ulcers that bleed easily on contact. It's very u
Genital warts, herpes, and molluscum bumps look enough alike that you usually can't tell them apart by sight. Warts tend to be rough or cauliflower-like, herpes shows up as painful blisters that crust
Chancroid symptoms are one or more deep, painful genital ulcers along with tender, swollen lymph nodes in the groin that can fill with pus. The ulcers are soft and ragged, and they hurt — which sets c
No — STD symptoms are very often invisible. Many of the most common sexually transmitted infections, including chlamydia, gonorrhea, HIV, and most HPV, cause no symptoms for weeks, years, or ever. Fee