My husband had a scrotal abscess drained about 3-4 ago. It was located jus behind the scrotal sac midline. He was put on Bactrim and they did not culture the drainage. Now another abscess has returned in close proximity to the first. It is slowly increasing in size and getting more painful. We were just wondering what is causing this and what should he do? Is there an antibiotic that can be taken to combat this?