I'm 20 i have 3inches of penies at my birth i can't do d urine so the doctors we're cut the skin on it ! naw i need to increase my pennies size what to do sir ?

Doctor can evaluate: One's primary doctor, a pediatric endocrinologist, or an adolescent medicine doctor all have experience with the normal development of boys to men. One concern is whether or not there is low sex hormones. Sometimes, a smaller penis is normal or may run in the family. Chromosomal analysis is sometimes done to see if there is a genetic cause. A pediatric urologist can also help.