When does a boy's penis begin to develop?

The growth of boys in children is divided into certain stages. The growth and development is faster at the age of 1 to 3, and slower at other ages. After entering puberty, the growth and development rate of the male genitals will be relatively faster. Children need a lot of nutrients during the development stage, so in terms of nutrition, children can eat more foods that contain more vitamins and protein.

The corpus cavernosum is a thin cylinder on each side, one on the left and one on the right, located between the bones of the penis. The left and right sides are closely connected, widening forward, narrowing at the front end, and placed in the indentation at the bottom of the glans penis. The rear end of the corpus cavernosum separates and is called the genital crus, which are attached to the lower abdominal branch and sciatic nerve branch of the phalanges on both sides. The urethral corpus cavernosum is located in the internal oblique muscle of the corpus cavernosum, and the urethral opening surrounds its total length. It is cylindrical in the middle, with the front end expanding into the glans penis and the rear end expanding into the urethral orifice bulb, located in the middle of the two genital crus and fixed on the muscle fascia under the urogenital diaphragm. The outer bread of each corpus cavernosum is covered with a thick layer of chemical fiber membrane, called the tunica albuginea of ​​the corpus cavernosum. The interior of the corpus cavernosum is composed of many posterior corpus cavernosum capsules and cavities, which are actually sinuses that communicate with blood vessels. When this cavity is swollen with blood, the male genitals become wide and hard, and become hard; otherwise, they become loose.

The three corpora cavernosa are surrounded by shallow and deep muscle fascia and skin. The membrane of the penis is thin and soft, and quite flexible. The skin goes forward from the neck of the penis to form two layers of annular wrinkles that surround the glans penis, called the foreskin, which folds back at the neck of the penis and changes to the skin of the glans penis. The cavity between the foreskin and the glans penis is called the foreskin cavity. On the center line of the internal oblique muscle of the glans penis, the wrinkled skin wall where the foreskin connects to the external opening of the urethra is called the frenulum. A long, tight, and infected foreskin will cause pain during sexual intercourse. In children, the foreskin is long and covers the entire glans penis. As the child ages, the foreskin gradually moves back and the foreskin opening expands. If the foreskin covers the urethral opening but can be turned up to expose the urethral opening and the glans penis, it is called long foreskin.

When the foreskin is too long and the opening is too small, or the foreskin completely covers the glans penis and cannot be opened, it is called prepuce. In both cases, it is easy to cause inflammation due to the irritation of waste in the foreskin cavity, which can also become a factor in causing penile cancer. Excessive prepuce should be surgically removed to expose the glans penis.