Suggest Treatment For A Pus Filled Bump On Thigh Near Groin Area

I am a 27 yr old female. Recently I noticed a red area on the inside of my thigh, near my groin area. Ive had it for about a week now & have been treating it with icthamol ointment which helps to soothe it. When I get out of the shower I usually try to sqeeze the pus(which has been yellow & bright green) but only a small amount comes out & there is a large hard ball deep under the skin,about the size of a dime maybe bigger. It is extremely painful. It doesnt seem to be getting better & I have actually had this in the same spot reaccur for a few yrs now..maybe 2 times a yr. Should I go to a doctor?