A short penis that can’t be felt at all can be caused by insufficient gonadotropin secretion, excessive gonadotropin secretion, and primary micropenis. Brain abnormalities such as hypothalamic or pituitary abnormalities and congenital gonadotropin release deficiency in the absence of brain abnormalities may lead to hypogonadotropic gonadotropin secretion, resulting in hypogonadotropic hypogonadism leading to a small penis. Excessive gonadotropin production can also cause hypogonadotropic hypogonadism, resulting in a short penis. The overproduction of gonadotropins can be due to a condition of the testicles themselves, such as congenital testicular agenesis, incomplete descent of the testicles and other conditions that can cause overproduction of gonadotropins and lead to symptoms of penile shortening. Short penis may also be primary micropenis, the etiology of which is not well understood, and it is hypothesized that it may be due to delayed gonadotropin stimulation in the late embryonic period, a transient decrease in testosterone secretion, etc. Many people have chromosomal mutations as well as sex chromosome abnormalities. If you have a short penis that you can’t feel at all, it is recommended that you seek medical attention in a timely manner and be treated under the guidance of a medical professional.