<s>[INST] last week i had sex with this girl who was really tight and afterwards my penis was really sore and it hurt pretty bad. its been a week and there is still a lump under the skin on the head of my penis near the pee hole. if I squeeze it some white puss like stuff comes out and it is a little bit painful. any idea what this could be? [/INST] Hello,Following unprotected sex there is always a chance of getting sexually transmitted infections (STIs). The lump and the soreness may be due to friction of your mucosa with the genitals of your partner that could have causing all these symptoms. To make the proper diagnosis you require physical examination to make proper diagnosis, and then we can decide on further course of treatment. Thank you. </s>