Generally speaking, it is okay to clean out the mud in the navel, but it is not recommended to pick it out directly by hand to avoid causing umbilitis. The navel is located in the depression of the abdominal skin, the skin in the metabolism, epidermal cells will appear to die, the phenomenon of shedding, when mixed with the sebaceous glands secretion of sebum, easy to accumulate to the navel, the formation of the navel in the mud. In addition, this is often in a humid state, so it is suitable for bacterial growth, for their own poor hygiene, when long-term accumulation will easily lead to belly button infection. When cleaning the mud in the navel, you can clean it once a month, and not too often. If the navel is relatively shallow, you can directly clean with water; if the navel is relatively deep, you can use a cotton swab dipped in some warm water to gently clean the navel; but for patients whose navel is too deep, it is recommended not to clean up on their own, and can be professionally handled under the operation of a doctor. In addition, you should avoid gouging to avoid damaging the skin and causing secondary bacterial infections that can lead to umbilicitis. If picked, the skin should be disinfected immediately with iodophor or alcohol, and if necessary, antibiotic creams containing ofloxacin can be applied to the surface of the navel to prevent the appearance of navel infection.