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.
There are two strains of the virus, HSV-1 and HSV-2. Typically HSV-1 causes cold sores on the mouth, while HSV-2 causes sores on the genitals. However, both strains can cause sores on the mouth and genitals as well as other areas of the body, if youâre exposed to them.