hi, I noticed that i have cyst like lumps inside my ball sack and they hurt, they are about the size of a pea, i have about 4 or 5 now, one became the size of a nickle and then turned really red and looked like it had puss in it, i doctored it and cleaned the area and poked it with a needle and now its almost gone, but the others are there and dont look like that one, what could it be?