If there is a bulge in something, there is a sudden large increase in it. ...a bulge in aircraft sales. ...the huge bulge of payments due over the next two years. Synonyms: increase, rise, boost, surge More Synonyms of bulge.
Two types of herpes simplex virus infections can cause genital herpes: 1  HSV-1. 2  This is the type that usually causes cold sores or fever blisters around your mouth, though it can be spread to your genital area during oral sex. 3  Recurrences are much less frequent than they are with HSV-2 infection.
Type 1 (HSV-1) usually causes oral herpes, an infection of the lips and mouth. Symptoms are commonly known as cold sores or fever blisters. In the past, HSV-1 was not known to cause genital herpes, but that is changing, especially among people who begin having sex at a young age.