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Free symptom checker

STD Risk Calculator & Symptom Checker

Answer a few questions about your risk factors and any symptoms. In under 3 minutes you get your overall STD risk level, a private ranked list of the conditions worth testing for, and where to get tested. Many STDs have no symptoms, so this works even if you feel fine, and it is a guide, not a diagnosis.

  • 100% anonymous
  • Under 3 minutes
  • No sign-up
Start the symptom checker

How it works

How this assessment works

  • 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.

  • 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.

  • Private by design

    It runs in your browser. We never ask for your name, email, or anything that identifies you.

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

Chlamydia Gonorrhea Syphilis HIV Genital herpes (HSV) HPV Genital warts Trichomoniasis Hepatitis A Hepatitis B Mpox Mycoplasma genitalium Nongonococcal urethritis (NGU) Hepatitis C Chancroid Lymphogranuloma venereum (LGV) Granuloma inguinale (Donovanosis) HIV

Vaginal & urinary health

Bacterial vaginosis (BV) Urinary tract infection (UTI) Pelvic inflammatory disease (PID) Vaginal yeast infection

Skin & parasitic conditions

Molluscum contagiosum Scabies Pubic lice (crabs)

How it works

Private results in three steps

1

Answer privately

A few quick questions about your symptoms and recent risk: no name, email, or sign-up.

2

See your matches

We rank the conditions your answers line up with, and flag anything that needs prompt care.

3

Get tested

Jump straight to at-home kits, private labs, or free local clinics, with real costs.

Medically Reviewed · Updated

Reviewed by Dr. Ngozi Adeyemi, 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 →

2 Sources

Clinical guidance

Good to Know

Symptom checker FAQs

What people ask most 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.

Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.

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