It is through the umbilical cord that the fetus exchanges blood and materials with the mother during embryonic development. The location of the cut umbilical cord becomes the navel. Hmmmmmmmm! It makes sense, I nodded my head desperately. But ……. The twist is that this time the connection is not the intestines and bladder in the sense that we were born. If you want to put it this way, our intestines and reproductive cavity and bladder were not separated at that time, they were all connected and connected. We won’t go into the bitter and difficult histocystology. In normal postnatal physiological atresia, nothing is connected behind the belly button. If there is a problem with the atresia process, there may be conditions such as unclosed umbilical ureter, umbilical polyp or umbilical sinus, bladder diverticulum, umbilical ureteral cyst, etc., which may cause urinary leakage or infection. If everyone had a bowel and bladder attached to the back, our laparoscopic surgery would be very difficult. Anyone who has had laparoscopic surgery knows this. The nursing staff will help us clean the belly button of dirt before the surgery, and there really are treasures that have never been cleaned for decades. Generally this is our first puncture hole (observation hole). So why do adults have a navel eye water it? The first easy to have odor, easy to hide dirt are deep belly button children. The reasoning is obvious. Belly button is a skin, metabolism will have the secretion of sebum, which is our usual common dirt. It is in the navel for too long, it will produce odor. There are reports of about 1,400 species of bacteria hiding here, but there is no need to worry too much, in most cases, they are non-pathogenic bacteria and peaceful. There is not much need for deliberate cleaning. Since it is skin, with sebum production, there is a possibility that it will grow folliculitis, boils and carbuncles, and “powdery tumors”, which can also lead to infections. Rough cleaning leads to skin breakage, bacteria invasion leads to infection. There is another category of people initially deep belly button, and then become shallow, in fact, the internal adhesions, the formation of gourd-like changes, the surface becomes shallow, but in fact the depth of the hole, will also be secondary to infection. Another kind is mentioned above. Problems in the process of occlusion, such as unclosed umbilical ureter, umbilical polyp or umbilical sinus, bladder diverticulum, umbilical ureter cyst, etc., which in turn cause leakage or infection. It is important to note that you can wash, either with warm water or by gently wiping with a cotton swab, to keep it dry. Do not pick roughly, the skin of the navel is relatively thin, if the strength of the key is not appropriate, it may damage the skin of the navel, and certainly not recommended navel nail. Already infected how to deal with a cotton swab with a little iodophor disinfectant, simple disinfection, can also be added with hydrogen peroxide for deep tissue oxygenation. Timely treatment of general disinfection for a few days the navel will return to normal. If an abscess has formed and the pain is obvious, seek medical attention promptly and apply antibiotics or require further examination and surgery depending on the situation.