<s>[INST] Concerns about a knot/bump on my penis. Not on the outside but on the muscle tissue. Initial stage of intercourse there is pain but that goes away as my erection becomes less hard. After intercourse today, I have bruising and swelling in the same area. [/INST] Hi, It might be a genital wart. You can consult a dermatologist and get evaluated. Hope I have answered your query. Let me know if I can assist you further. </s>