The severity of secondary bacterial infectious inflammation of the skin in the navel area in adults depends on the degree of local infectious inflammation and is commonly analyzed as follows: 1. If the local infectious inflammation is more severe and causes systemic clinical manifestations, such as fever, increased white blood cells and other more serious infectious inflammation, suggesting a more serious condition; 2. If the local infectious inflammation is mild, with only edematous erythema or pain and exudate, etc., it indicates that the severity of inflammation is not high, and treatment should be actively carried out. The adult navel area is a recess, which is often missed when bathing, and is also an area rich in sweat glands and small sweat glands. Local epidermal cells are shed to form keratinocytes, which mix with the fluid secreted by sweat glands and small sweat glands and can form a moist mud due to untimely cleaning, which is actually shed keratinocytes. Some patients are accustomed to picking, poking or scratching or grabbing, which can lead to local skin breakage and secondary bacterial infections. Local bacterial infection, patients need to strengthen anti-inflammatory treatment, you can apply antibacterial ointment externally, if more serious, need to cooperate with antibacterial drugs for oral treatment. Patients or normal people should pay attention to cleaning the navel area when bathing, and locally do not often pick, grab, squeeze, rub, etc. by themselves to avoid local skin breakage and secondary infection.