Patient's question:
Why is my penis only 13 cm long when erect, with a circumference of 4 cm? How can I make it grow longer? I am currently 17 years old. I hope a doctor can tell me.Doctor's answer:
Hello, the normal penis is 7-9 cm long in a flaccid state and 11-16 cm long when erect, with a circumference of 6.9-9.4 cm. It generally reaches full development around the age of 18. Based on your current condition, it is normal, and there is no need for special treatment if it does not affect normal sexual life. Wishing you good health!