B00: Herpesviral [herpes simplex] infections

B00.1: Herpesviral vesicular dermatitis

There are various kinds of herpes viruses. You have been infected with herpes simplex viruses. A person can be infected with herpes viruses via saliva, for example, or through sex. Some of the viruses remain in your body throughout your life. For example, if you are stressed or the defense system is weakened, the viruses can cause symptoms again.

The viruses cause blisters to form on the face or ears. The blisters often form on the lip. The lymph nodes may swell up and become sore.