What you're looking at: Herpes simplex virus (HSV) This image shows classic grouped, fluid filled blisters on a red base, which is the hallmark appearance of herpes. Herpes is caused by the herpes Can You Catch STDs From Sex Toys? Home STD Tests myLAB Box Can You Give Yourself Genital Herpes? AskDocGilbert How Can I Avoid Genital Herpes? Use condoms, avoid sex during outbreaks, and talk openly with partners about STI status. If your partner has herpes, antiviral meds can reduce Herpes labialis, also called a cold sore, is usually caused by HSV 1. The virus stays in the body and can become active again later, so cold sores may come and Getting Sexy with Herpes Pure Romance