After the blisters break, they turn into sores or ulcers. These can be on or near the mouth, eyes, genitals, or rectum. They may not have symptoms or not notice them.įor people who do have symptoms, a herpes infection may show up as one or more blisters. Most people with herpes infection don’t even know it. Did you know that the virus that causes “cold sores” or “fever blisters” on or around the mouth can also infect other areas of the body? The infection is caused by the herpes simplex virus.
