Both sides of the nail cover are particularly hard dead skin considerations may be excessive friction, pruning is not diligent due to, but also may be related to eczema, ringworm and other factors, the need for timely treatment. 1. If you do not trim the dead skin on both sides of the nail cover for a long time, repeated friction, dead skin gathered together may produce this symptom, generally do not have to use drugs to treat, usually do a good job of trimming, diligent foot soaking. 2. eczema, if there is eczema without timely treatment, may lead to skin keratin layer hyperplasia, so there will be this symptom, need to use zinc oxide ointment, flumethasone cream and other drugs under the guidance of the doctor. 3. Ringworm of the nails, some patients with ringworm of the nails due to the invasion of fungi may lead to excessive keratinization of the skin, this symptom, can be used under the guidance of the doctor, amorphophallus powder, terbinafine hydrochloride and other drugs to treat. Normally, it is best not to rub the nail cover excessively often, so as not to lead to infection.