Alert

Herpes Simplex

Herpes simplex is a virus that can cause painful blisters and sores. The virus usually affects the skin and the thin layers of tissue that moisten, lubricate, and protect certain parts of the body (mucous membranes).

The two main types of herpes simplex viruses are type 1 (HSV-1) and type 2 (HSV-2). Both types of the virus can cause sores on the lips (cold sores) and sores on the genitals (genital herpes). HSV-1 more often causes cold sores. HSV-2 more often causes genital sores. The viruses are transmitted by direct contact, such as touching a sore directly or through sexual contact.

A herpes infection may cause only a single outbreak of sores. But in many cases the person will have recurrent outbreaks. Recurring infections can be triggered by factors such as stress, fatigue, sunlight, or another infection, such as a cold or flu.

Treatment can reduce the number and severity of outbreaks but cannot cure the infection.

Herpes zoster, another form of herpes virus, causes chickenpox and shingles.

Symptom Checker

Feeling under the weather?

Healthwise Symptom Checker Logo

Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.

Decision Points

Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.

You'll find Decision Points to help you answer questions about:

Interactive Tools

Get started learning more about your health!

Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.

Top