In recent years, with the improvement of people’s living standards, many parents have found that their little boy’s body is fat and cute, but the penis is hiding behind a pile of fat and does not want to see people, which makes mothers and fathers anxious. This kind of hidden penis is usually considered to be occult penis, what is this all about? As the name suggests, the hidden penis is the normal penis, buried in the subcutaneous or subcutaneous fat, and therefore from the appearance of the penis is very short. However, our parents and friends do not know that there is a difference between pseudo and real occult penis, and blind treatment will only increase the pain and mental stress of children. Because children are too obese, the penis is buried in the fat layer and the exposed part is small. This situation is normal in children born in fashion, but in the process of growth, eating too much, less exercise, once the fat accumulation, the penis gradually buried under the skin. In this case, as long as the diet is properly controlled during pubertal development and the weight is lost by strengthening exercise, the situation will improve and generally no treatment is needed, these are pseudo-hypophyseal penis. True anaphylactic penis is a disease in which the penis body develops normally but reveals abnormally, mostly seen in prepubescent children, and the prevalence rate among adolescent penile deformities is 0.67%, second only to prepuce and circumcision. Most scholars believe that occult penis is caused by the following reasons: the sarcoid layer is poorly developed and elastic, which restricts the expansion of the penis and makes the penis fixed under the pubic symphysis, resulting in the penis being hidden under the skin; the sarcoid muscle is abnormally attached to the penile corpus cavernosum, making the penis skin bound to the abdominal wall and preventing the normal development of the penis skin. Other scholars believe that in occult penis, the foreskin is short on the dorsal side and long on the ventral side, with more inner plates and less outer plates, and the foreskin wraps around the penis like a bird’s beak and does not attach to the penis body. In this way, only the head of the penis or some foreskin folds are seen exposed outside the skin, so some people figuratively compare it to the bat sleeve in fashion, while the penis stem is buried under the skin. This situation requires surgery, the penis free “pull” out, the skin tightly wrapped around the penis, so that the formation of a cylindrical penis, so that the original development of the normal penis will be returned to its true nature. So when is it appropriate for these little men to “pull out” the hidden penis? This is another headache for many parents. As a researcher in this area, I believe that the timing of surgery varies depending on the cause of the disease. For those who are simply obese with fat accumulation in front of the pubic bone, a considerable number of children will improve on their own with age and weight loss, and can be treated through weight loss and exercise, and many children can heal on their own; but for children with severe penile recession, most scholars advocate surgery, which should be performed after the age of 12-14, because at this age, the level of androgens in children’s bodies gradually increases and the penis develops faster. Penile development is faster, and the appearance of the penis changes more, together with the redistribution of fat in the perineum, which is the key age for children with occult penis to heal themselves. In the case of hypospadias and fibrous band restricting penile expansion and contraction, it is usually not self-healing, so I think it is advisable to operate as early as possible. There are many surgical methods for anaplasia, and the simple penile fixation is rarely used. We often choose different surgical methods according to the different etiology and severity of the condition of the child, so as to personalize the surgical methods, and improve many previous surgical methods based on decades of experience. The modified Johnston procedure, the modified Maizels procedure, the modified Devine procedure, etc. are commonly used for the treatment of anaplasia, and all of them have achieved more satisfactory results. Therefore, parents of children with anaplasmosis must be vigilant to let their children get professional examination and clear diagnosis in order to choose the correct surgical method so as to avoid misdiagnosis and mistreatment.