Adult navel redness is very itchy may be caused by physiological reasons, such as long-term retention of dirt; may also be caused by pathological reasons, such as allergic skin disease, bacterial infectious skin disease, and so on. 1. Physiological reasons: common such as long-term retention of dirt. Due to the special physiological structure of the navel area, it is easy to hide dirt. If the dirt in the navel among the long time gathering to stay, it is easy to form the stimulation of the part of the skin mucosa, resulting in the navel part of the skin inflammation caused by the skin around the navel allergic itching. 2. Pathologic causes: (1) allergic dermatosis: common such as contact dermatitis, when the patient contact with metal buckle pants or belt with metal buckle, in contact with the part of the skin erythema, accompanied by itching, etc., considering that the patient is allergic to the metal component caused. Contact dermatitis patients in the treatment, first stop wearing clothing with metal buttons or metal belt, and at the same time, follow the doctor’s instructions for external use of mometasone furoate cream, tretinoin cream and other glucocorticoid cream, or oral loratadine, cetirizine and other antihistamines. (2) Bacterial infectious skin disease: Bacterial infection can cause umbilical infection. Tiny breaks in the skin of the umbilicus allow bacteria to infect the umbilicus, leading to bacterial infectious disease, which makes the umbilicus red and itchy. In terms of treatment, patients need to avoid local scratching, extrusion, etc. Topical antibiotic ointment, such as mupirocin ointment, fusidic acid cream, etc., can also be prescribed to choose sensitive antibiotics for anti-infection treatment, such as cefaclor, cefixime and so on. Serious cases may appear purulent secretions need to be regularly disinfected and changed under the guidance of the doctor to avoid causing deep infection. It is recommended that patients with persistent redness and itchiness of the umbilicus should go to a regular hospital in time to get a clear diagnosis and follow the doctor’s instructions for standardized treatment.