Itchy belly button to be alert to four diseases, not really. Itchy belly button, may be physiological factors, may also be certain diseases, such as navel infection, skin allergies, eczema, fungal infections and other factors caused. Itchy belly button may be caused by physiological factors, the belly button is a recessed skin folds, usually difficult to clean, it is easy to hide dirt inside, easy to cause itching. It can also be considered related to pathological factors, such as navel inflammation, skin allergies, eczema, chronic simple moss and other diseases, which may lead to local hypertrophy, roughness, may cause intense itching. In addition to this, the navel is infected by fungi, which may also cause significant itching sensation. It is recommended not to scratch the irritation to avoid inducing bacterial infection. It is recommended that patients go to the dermatology department of the hospital if necessary, first to clarify the cause, and then combined with the doctor’s advice, follow the doctor’s instructions to give the appropriate drug treatment.