The skin of the penis is very thin and can move. In front of the penis, the skin is folded into two layers and covered on the glans penis. This covers the skin of the glans penis and is called foreskin. Under normal circumstances, the foreskin of children before the age of 7 is very long and can completely cover the glans penis. With the development of adolescence, the penis grows longer and longer, so the foreskin can't cover the glans, and the glans is exposed. But in some adults, the foreskin is still completely covered. Even when the penis is completely erect, the glans penis cannot be completely exposed, which is called too long foreskin; If the foreskin mouth is too small and too tight to be turned up to expose the glans, it is called phimosis. Whether phimosis or foreskin is too long, because the foreskin wraps the glans penis for a long time, the temperature and humidity in the foreskin increase, which is easy to make bacteria grow and multiply, causing inflammation. Over time, adhesion can be formed between the foreskin and glans penis, resulting in pain during sexual intercourse. In addition, the sebaceous glands of the foreskin will secrete a strange smelly substance called smegma. This scale is difficult to remove when the foreskin is too long, especially phimosis. Animal experiments have proved that skin scales can cause cancer. Clinical data also prove that the incidence of penile cancer is high in patients with long foreskin, especially phimosis. Therefore, it is very important for comrades who are too long in foreskin and unwilling to have surgery to turn over the foreskin frequently to clean up the scales. According to clinical practice, some patients with long foreskin are not too long, but it is difficult to adapt to the discomfort caused by the friction between the third glans and underwear, and they are unwilling to turn the foreskin up. It is suggested that the foreskin should be turned over to the coronal groove to expose the glans penis, and the discomfort will soon disappear.

Embryologically speaking, phimosis is rare, which is mainly caused by acquired local inflammation. Therefore, parents often help them turn over their foreskin and remove scale from their children, which may prevent phimosis. For adult phimosis and foreskin are too long, it is better to operate as soon as possible. For children before the age of 7, the foreskin is too long, because the penis is undeveloped, it is not necessarily too long, and there is no need for surgery. Help turn the foreskin over and clean it often.

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