How To Treat Tightness In Foreskin And Itchiness In Penis?

Im 22 years old, 5 feet 8, weigh 8 stone 4 lbs.

I was having intercourse and have a slightly tight foreskin, I have consulted with the doctor about this and was told i need to get some surgery to stretch my foreskin. However I had intercourse last week and my meatus (tip of the penis) is to a small extent damaged, just slightly torn and quite itchy, I havent had intercourse since. How should I treat this?