I am 18yrs old....I mastrubated last night...on the next day morning I felt my penis paining... When I saw my penis ,it was swollen...not then whole penis...just the foreskin...I'm sacred a bit...I don't have any urinating problems... Its just the swollen foreskin...so what should I do?? Am I in danger?? Please give me some advise... What should I do?