My perinium has been swollen since Saturday. This is the second time it has happened. Both times have been soon after I shave my vaginal area as well as using new body wash and having sex. I also wear thongs. Ever since this started again I have stopped wearing thongs, and stopped shaving and having sex until this goes away. Any insight as to what this could be? It s swollen from the left side opening of my vagina onto the perinium. It is no where near my anus. Please help. Thank you in advance.