What is penis twitching?

Some people occasionally experience penis twitching. Many people don't know what's going on. There are many reasons for this phenomenon, mainly due to smooth muscle spasms, neurological factors, and excessive fatigue. Generally, it will heal after a short rest. If the symptoms are more serious, you should go to the hospital for examination in time. The structure of the penis is relatively not very complicated. Let's take a closer look.

1. It is divided into three parts: root, body and head. The rear part is the root of the penis, which is attached to the inferior ramus of the pubic bone, the sciatic ramus and the urogenital diaphragm; the middle part is the body of the penis, which is cylindrical and hangs down in front of the pubic symphysis; the front part is enlarged as the glans penis, with a sagittal cleft at the tip of the head called the external urethral orifice, and there is a ring-shaped groove at the junction of the head and the body called the penis neck or coronal sulcus.

2. The corpus cavernosum of the penis is a cylinder with two tapered ends, one on the left and one on the right, located on the dorsal side of the penis. The left and right are tightly combined and extend forward, with the front end tapering and embedded in the depression on the bottom of the glans penis. The rear end of the corpus cavernosum of the penis is separated, called the crus penis, which is attached to the inferior pubic ventral branch and the sciatic branch of the pubic bones on both sides respectively. The corpus cavernosum of the urethra is located on the ventral side of the corpus cavernosum of the penis, and the urethra runs through its entire length. The middle part is cylindrical, with the front end bulging into the glans penis and the rear end bulging into the urethral bulb, located in the middle of the two crus penis and fixed on the fascia below the urogenital diaphragm. Each corpus cavernosum is wrapped with a thick fibrous membrane, called the tunica albuginea of ​​the corpus cavernosum.

The interior of the corpus cavernosum is composed of many trabeculae and cavities, which are actually sinus spaces connected to blood vessels. When these cavities are filled with blood, the penis becomes thicker and harder and erects; otherwise, it becomes soft. The three corpora cavernosa are covered with superficial and deep penile fascia and skin. The penis membrane is thin, soft and stretchable.

The skin moves forward from the penis neck to form a double-layered circular fold that wraps around the penis head, called the foreskin, which turns back to the skin of the penis head at the penis neck. The cavity between the foreskin and the penis head is called the foreskin cavity. On the ventral midline of the penis head, the skin fold that connects the foreskin to the external opening of the urethra is called the frenulum.

If the foreskin is too long, too tight, or infected, it can cause pain during sexual intercourse. In young children, the foreskin is longer and covers the entire glans penis. As the age increases, the foreskin gradually retracts and the foreskin opening expands accordingly. If the foreskin covers the urethra but can be turned up to expose the external opening of the urethra and the glans penis, it is called foreskin. When the foreskin opening is too small and the foreskin completely covers the glans penis and cannot be turned up, it is called phimosis.