I recently had a rash in the area of my vagina to my anus but yesterday i decided to put anti biotics and now it is swollen with a rash. what to do?

Stop application: Use cold compresse to relieve swelling or colostrum baths.Aply Caladryl if irritated ,Of not ;allow area irritation to resolve with time.Use a very mild soap when washing area or no soap

Perineum: Rash and swelling in the perineal area may be due to a herpes or yeast infection, or be due to an allergic reaction to clothing or other object. I recommend that you have your physician or gynecologist examine and treat you.