Suggest Treatment For Thick Foreskin On The Penis

The skin on my pennies doesn’t come back......it come back very little. I can masturbate easily....but i have never seen the head of my pennies...even my pennies is erected i cant see the head....it comes back very little......so what should i do now....can i have sex ???? are there any surgery’s ??? so cant i have sex before circumcised surgery ??? and will that surgery pain ??? and do u have any idea how is it done ???