Hi, I'm a 18 years old boy that go an unprotected sexual relation with my girlfriend. It was my second time, so I don't really have any habit in having sex. 1 or 2 days after it, the skin under the head of my penis begin to swell, and some little red bump appeared on the bottom of the head of my penis, the swell part is itching sometimes, but not bad, the little bump arent itching, they arent big really. I don't have any problem to pee, it doesnt not burn