My penis has only grown about one inch. i am 19 now but i worry if it is a problem or something else?

Doctor can evaluate: One's regular pediatrician, 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.