Itchy toe crevices may be caused by foot fungal infections, foot eczema, sweat herpes and so on. 1. Foot fungal infection: toe crack infection fungus caused by ringworm, can cause toe crack local skin blisters, vesicles and other symptoms, mostly accompanied by toe crack itching, pain symptoms. 2. foot eczema: patients are allergic, can be due to foot skin trauma and other factors stimulate the onset of, if appear in the toe seam, can be manifested as a localized dense pimples, erythema, blisters, vesicles and other symptoms of damage, mostly accompanied by toe seam local itching, pain, redness and swelling. 3. Sweat herpes: mostly related to local infections, local allergies, excessive sweating, mental and other factors, can be manifested as the toe seam appeared pinpoint blisters, accompanied by itching. If the symptoms of itchy toe seams appear for a long time, and accompanied by different degrees of skin damage, it is recommended to consult a doctor in time to find out the cause of active treatment, so as not to delay the condition.