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.
Herpes simplex virus 1 (HSV-1) is the main cause of oral herpes infections that occur on the mouth and lips. These include cold sores and fever blisters. HSV-1 can also cause genital herpes. Herpes simplex virus 2 (HSV-2) is the most common cause of genital herpes, but it can also cause oral herpes.