<s>[INST] Hi, my wife and I have recently had a resurgence in our sex life just this past month that has led to daily intercourse, many times through out the day.  Just this past week, I've noticed the skin under my penis head, very red, very sensitive and what looks like some thin cuts around the circumference of my penis.  During arousal and especially intercourse, I have felt pain. We've both been checked for STD's and have come back negative. What would can I do to avoid this problem. [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Frictional cuts are very common on the foreskin during sexual intercourse in men who are not circumcised. I would recommend you to use fusidic acid ointment on the effected area twice daily for 4 days until the cuts are healed. Meanwhile use good amount of lubrication during sexual intercourse to decrease the friction. Lastly, I would recommend you to get circumcision done because repeated cuts and injuries on foreskin will cause inflammation and fibrosis on the foreskin. Which leads to tightening of foreskin and makes it difficult to retract foreskin over the glans penis leading to phimosis, which is quite painful condition. Hope I have answered your query. Let me know if I can assist you further. </s>