<s>[INST] I am a 24 year old male i just masturbating a little to vigorously and not 2 minutes later right under the head of my penis on the under side swelled.... My penis is a little sore not really at all. But I took a shower and massaged it. the swelling has gone down but there is still a small red bump left after. Should I be afraid? should I go to the doctor Immediately? there was no bump before I masturbated and I Know I don t have any stis because I literally was just checked. SOMEONE HELP! [/INST] You need not get tensed. It is good that the swelling is reduced. Just keep your penis clean and Chat Doctor.  Do not apply too much of soap or creams in that region. Wait and see if the red bump regresses by itself in 2-3 days, if not consult a dermatologist. Keep in mind not to bruise your penis by doing rough activities. It is a sensitive region. If there is pain, you may take Flexion or Coquitlam tablets, one after having food. TC </s>