Rotten and itchy toe crevices are most commonly seen in conditions such as tinea pedis, eczema, and herpes sweating. It needs to be treated according to different situations. 1. Tinea pedis: a disease caused by local fungal infections, tinea pedis can be divided into various types, toe crevice rotten and itchy commonly seen in vesiculobullous tinea pedis. 2. Eczema: If acute eczema occurs in the foot, it can also appear as itchy toes with itchy cracks, accompanied by oozing and other symptoms. 3. Sweat herpes: also known as sweating bad eczema, the main symptom in the hands and feet parts of the symmetrical distribution of blisters, blisters can be localized after absorption of peeling, revealing the red new skin, accompanied by intense itching. Toe gap is rotten and itchy need to first consult a doctor to clarify the cause of the disease to take targeted treatment, medication to follow the doctor’s instructions, not blindly self-medication, in order to prevent medication errors, aggravate the symptoms. Daily to keep the feet clean, slippers, foot wash basin, etc. dedicated, and regularly disinfected.