A related herpes virus causes cold sores on the lips ( Figure below ). Both viruses cause painful blisters. In the case of genital herpes , the blisters are on the penis or around the vaginal opening. The blisters go away on their own, but the virus remains in the body. The blisters may come back repeatedly, especially when a person is under stress. There is no cure for genital herpes. But drugs can help prevent or shorten outbreaks. Researchers are trying to find a vaccine to prevent genital herpes.
Mark noticed that he had a painful blister on his mouth again. Mark frequently got cold sores when he was under a lot of stress. He called his doctor to get some medicine for it.
Will the blister go away on its own or does it need to be treated.