What are the causes of a small penis?

Hypospadias

is a congenital malformation of the external genitals, which can affect the development of the penis,

resulting in low testosterone levels, affecting the development of the penis, resulting in small penis.

2

. Excessive gonadotropin secretion

can cause abnormal testicular reactions, such as testicular absence, testicular insufficiency, etc., resulting in testosterone secretion disorders, also causing small penis