Symptoms and Diagnosis
What Does an STD Rash Look Like? A Visual Guide
Jan 27, 2025
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.

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.