American Academy of Pediatrics. Pediatrics. 131 (4).
American Academy of Pediatrics: 796-800. doi:10.1542/peds.2012-2896. The congenital concealed penis disease also results in short penis. Can penis extenders treat Peyronie’s disease? Archives of Disease in Childhood. Nonsurgical methods involve tissue expansion by stretching the penile skin forward over the glans penis with the aid of tension. There are various non-surgical methods and products marketed as alternatives to surgical penile enlargement.

There is a consensus among the world's major medical organizations and in the academic literature that circumcision is an efficacious intervention for HIV prevention in high-risk populations if carried out by medical professionals under safe conditions. Current medical advice and public health projects now underway seem to point to a worldwide increase in circumcision rates in the first half of the twenty-first century.

Men use them to improve their performance and sexual health, as well as increase their libido and stamina. Men who feel their penis is too small compared to their body size or feel their penis size has a negative effect on their sexual performance and self-confidence may qualify for penis enlargement.
None of the studies that have been done point to any one technique as an effective way to permanently lengthen the penis.