Adults with red and itchy navels may be associated with navel infection, contact dermatitis, eczema and other causes. 1. Umbilicitis: due to the inflammatory reaction caused by bacteria invading the umbilicus, redness, itching and pain of the umbilical skin can occur. 2. Contact dermatitis: If the skin near the navel comes into contact with allergenic substances such as metal belt buckles, it can cause the body to undergo abnormal immunity, resulting in redness and itching of the navel. 3. Eczema: due to mental stress, external stimuli and other factors, the first skin erythema, pimples, flaking, moss-like changes with itching symptoms. It is recommended that the navel red and itchy patients go to the hospital in a timely manner to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, so as not to delay the condition.