The structure of the penis mainly consists of two penile corpus cavernosum, one urethral corpus cavernosum and its outer covering of deep and superficial fascia and skin. The penis is cylindrical in shape and consists of two penile corpus cavernosum and one urethral corpus cavernosum. The corpus cavernosum is a cylindrical body with two thin, pointed ends, located on the dorsal side of the penis, one on each side. Its anterior end is often embedded in the depression behind the head of the penis; the posterior end is the pedicle of the penis, attached to the subpubic and sciatic branches on each side. The ventral side of the corpus cavernosum of the penis is the urethral corpus cavernosum, in which the urethra runs through its entire length. Its anterior end expands into the head of the penis; its posterior end enlarges into the urethral bulb. The deep fascia on the outside of the penis forms the suspensory ligament of the penis at the root of the penis, which suspends the penis from the pubic symphysis. In case of discomfort, prompt medical attention is recommended.