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Penis is made up of a spongy body that can grow or shrink - the inside of the penis is like a blood-filled sponge.

The length of the foreskin does not have to be circumcised, but if there is phimosis or the foreskin frenulum is too short, the circumcision is required.

It is best to wash the penis every day. When washing, you need to gently pull the foreskin back and clean the glans with warm water.

It is recommended to only use warm water when cleaning penis, because using soap may disrupt the natural balance of the genitals, leading to bacterial growth and infection. If you must use soap, choose mild, non-scented, and only use it in the middle of the penis , do not use inside the foreskin

Be sure to remove sebum when washing. this is a yellowish white, sticky substance that can collect under your foreskin and cause odor, inflammation and infection.

Ultrasound refers to the physiological phenomenon that the penis expands and props up. There are three cavernous tubes inside the penis. When you have sexual impulses, the cavernous body is congested, and the penis also becomes thicker, longer and harder.

The penis may be straight during erection: it may also be curved: it may be curved upwards, downwards, leftwards - generally if it is bent more than 30 degrees, it is curved to the right.. It may require treatment.

The penis does not develop twice, and the methods of increasing the penis, such as drugs, stretching and weight-bearing methods, not only will not have much effect, but may have health risks.

Small penis is very rare. If the penis is shorter than 7 cm when erect, it is considered that the penis is too small. But do not make the diagnosis yourself, because your measurement method is likely to be inaccurate.

Although there is no bone in the penis, it is possible for the penis to break during an erection, causing pain and hematoma. In this case, emergency surgery is required.