i have a 8 year old boy. he was circumsized 2 times after birth and at 1 year bc the foreskin grew up over the head of his penis. anyway its been normall after that until today he mentioned that his "thang" hurt. upon checking, the skin behing his head is swollen and red. it looked like it had a little pus but not sure. there is a smell to it. any idea of what this could be????