What Does an STD Rash Look Like? A Visual Guide

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).

• Herpes:

  • Appearance: Clustered blisters around genitals/mouth.

  • Timing: 2–12 days post-exposure.

• HIV:

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

  • Timing: 2–4 weeks post-exposure.

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.