How Can Excess Skin On Penis Be Treated?

Hello. I am a circumcised 18-year-old male. I got circumcised when I was 13. There is a small amount of my foreskin left behind, I remember the doctor saying it was in case of further penis growth. However, recently the remaining skin has become quite wrinkled, loose, thin and unsightly. The skin around my penis that s not foreskin is also noticably looser and snaps back to it s original position much slower than it used to. Sometimes throughout the day I get random pains in my penis. Usually it s because I masturbated the day before. In the middle of masturbation, sometimes my penis hurts, but I usually go on anyway. How do I solve the remaining excess skin s appearance problem? YYYY@YYYY