The hazards of umbilical spikes mainly include local discomfort, skin infection and umbilical infection. 1.Local discomfort: Umbilical spikes are invasive, need to pierce the original skin, so there will be a certain amount of swelling, pain, the phenomenon needs a period of time to recover, will cause discomfort to the human body. 2. Skin infection: improper care of the nail may induce skin infection, or even lead to localized scarring, which is counterproductive and has a certain impact on aesthetics. 3. Umbilical cord infection: Umbilical cord nailing may induce umbilical cord infection due to the invasion of bacteria and viruses, which may lead to itching and foul smell in the navel, and in severe cases, may even induce sepsis. Umbilical nailing is risky and is not recommended. If you need to have your umbilical cord nailed, you must choose a formal organization to reduce the risk, and at the same time, you should do a good job of post-care work.