Free symptom checker
STD symptom checker
Answer a few questions about your symptoms and risk factors. In under 3 minutes you'll get a private, ranked list of the conditions worth testing for — and where to get tested. Many STDs have no symptoms, so this is a guide, not a diagnosis.
- 100% anonymous
- Under 3 minutes
- No sign-up
Medically reviewed by Dr. Amara Okafor, MD, MPH · Updated June 2026
Or check a specific condition
Run a single-condition assessment
Already know what you're worried about? Jump straight to a focused assessment for that condition.
STDs & STIs
Vaginal & urinary health
Skin & parasitic conditions
How it works
Private results in three steps
Answer privately
A few quick questions about your symptoms and recent risk — no name, email, or sign-up.
See your matches
We rank the conditions your answers line up with, and flag anything that needs prompt care.
Get tested
Jump straight to at-home kits, private labs, or free local clinics — with real costs.
Good to Know
Symptom-checker FAQ
What people ask before using an STD symptom checker.
Is this STD symptom checker really anonymous?
Yes. We never ask for your name, email, or anything that identifies you. Your answers run in your browser to produce your result; only the anonymous answer choices may be counted to improve the tool.
Can a symptom checker diagnose an STD?
No. Nothing online can diagnose an STD — many infections cause no symptoms, and different STDs share the same symptoms. This tool tells you which conditions are worth testing for; only a lab test can confirm or rule one out.
I have no symptoms — should I still test?
Often, yes. Most chlamydia and gonorrhea infections, and many cases of HIV, herpes, and HPV, have no symptoms. If you've had a new partner or condomless sex, testing is the only way to know your status.
I think I was exposed to HIV in the last few days — what do I do?
Don't wait. PEP (post-exposure prophylaxis) can prevent HIV if started within 72 hours of exposure, and sooner is better. Go to an urgent care, ER, or sexual-health clinic now and ask for PEP.
Trust & transparency
How this assessment works
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Grounded in public-health guidance
The questions — and how heavily each answer counts — follow the risk factors and symptoms the CDC and WHO describe for these conditions.
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A risk guide, not a diagnosis
Your answers produce a risk level — how concerned to be — and flag anything that needs urgent care. Only a lab test can confirm or rule out an infection.
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Private by design
It runs in your browser. We never ask for your name, email, or anything that identifies you.
Medically reviewed · Updated
Reviewed by Dr. Amara Okafor, MD, MPH · Infectious Disease & Epidemiology
Board-certified in infectious disease with a focus on STI epidemiology and public-health screening programs. Leads testing, diagnosis and the data-driven 'state of STDs' reporting. Our editorial guidelines →
Sources & references
2 Sources
Clinical guidance
- CDC — Sexually Transmitted Infections (STIs) https://www.cdc.gov/sti/
- World Health Organization — Sexually transmitted infections (STIs) fact sheet https://www.who.int/news-room/fact-sheets/detail/sexually-transmitted-infections-(stis)
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