Hi I'm a new user,I've been getting the same lump every three months behind my right ear.. its very uncomfortable and I can't wear earrings.after a month it swells so much it bursts and puss seeps out... im just wondering what causes this problem?? :confused:

The cause of this problem may be an irritated hair follicle . Or better known as an ingrown hair, These can be very small or very large . And most often come and go. . keep the area clean use a drying agent like peroxide or alcohol and a topical anti- biotic ointment to prevent any infection.. just let you family dr. know they do make a topical med, to help prevent them.. take care