Symptoms and Diagnosis

What Does an STD Rash Look Like? A Visual Guide

Jan 27, 2025

Man with a rash
Man with a rash
Man with a rash

Rashes are a common but confusing STD symptom. This guide uses CDC data to help you identify potential infections and when to visit a clinic.

STD Rashes: Descriptions

  • Syphilis:

    • Appearance: Red/brown sores (chancre) or rough red rash on palms/soles.

    • Timing: 3–6 weeks post-exposure (CDC).

Syphilis rash
  • Herpes:

    • Appearance: Clustered blisters around genitals/mouth.

    • Timing: 2–12 days post-exposure.

Herpes rash
  • HIV:

    • Appearance: Red, itchy patches (acute HIV rash).

    • Timing: 2–4 weeks post-exposure.

HIV rash

When to Get Tested

If you notice a rash near your genitals or mouth after unprotected sex, don’t wait – visit a clinic immediately.

Can an STD Rash Go Away on Its Own?

Yes, but the infection remains. For example, a syphilis rash may disappear without treatment, but the bacteria stay in your body, causing long-term damage.

Case Study: Lisa’s Syphilis Scare

Lisa, 34, noticed a painless sore on her lip. A 10-Panel Test confirmed syphilis. “The clinic’s quick diagnosis saved me from complications,” she says.

Don’t Know What Could Be Causing Your Symptoms?

Get the complete STD test panel and take control of your health!

Don’t Know What Could Be Causing Your Symptoms?

Get the complete STD test panel and take control of your health!

Don’t Know What Could Be Causing Your Symptoms?

Get the complete STD test panel and take control of your health!

Dr. Michael portrait

Dr. Michael Thompson

Dr. Michael Thompson is an expert in sexually transmitted diseases with extensive clinical and research experience. He leads campaigns advocating for early diagnosis and prevention of diseases like HIV and gonorrhea. He collaborates with local organizations to educate both youth and adults about sexual health.