Researchers recently looked at Melissa officinalis and found that it inhibits degenerative changes caused by the herpes virus. Keep in mind herpes type 2 can infect anywhere in the body, not just the genitals. It can cause problems with fertility, neurological problems and be extremely uncomfortable, so it is important to treat infections quickly and take preventative measures.
 
Nat Prod Res. 2008 Nov;22(16):1433-1440.