Belly button itchy, red cause, consider for the following conditions: 1, consider for allergic skin diseases, mainly because of this kind of people wear with metal buckle pants or with metal buckle belt after, in contact with the site can appear skin flushing, accompanied by itching, consider for metal nickel allergy. Clinically, so contact dermatitis patients in the treatment, first stop applying the metal buckle or metal belt pants wear, at the same time can apply mometasone furoate cream and urea Vitamin E cream mixed topical. 2, considered for fungal diseases, such as ringworm, mainly due to the family kept pets, pets on the parasites infected to the people caused by skin fungal diseases. Therefore, in the treatment, you can apply terbinafine hydrochloride cream and mometasone furoate cream mixed topical. Therefore, for the belly button itchy, red, need to go to the regular hospital, under the guidance of dermatologists to carry out the appropriate laboratory tests to determine the cause of the disease, to guide the clinical treatment.