Do you mean on the corona / rim of the head of your penis. If so these are Pearly Penile Papules. These are quite normal and natural and are of no concern.
Have you just noticed them? What age are you?
If you mean the wrinkled skin at the top of the shaft of your penis this is due to lack of the correct hydration for the skin in that area associated with circumcision. Do not use soap or shower gel to clean your penis with, water only, apply some liquid Coconut Oil 3 or 4 times a week after you have taken a shower …