Skin crusting hard itch may be a normal physiological phenomenon, generally do not need special treatment, if repeated crusting, itching, may be suffering from chronic eczema, neurodermatitis, etc., need to receive timely treatment, such as drug therapy. 1. Normal phenomenon: the organism local skin tissue damage, the new tissue is rich in blood vessels and nerves, sensitive to external stimuli, generally do not need to deal with, but need to pay attention to avoid scratching, scratching, to prevent secondary infections, if the itching is unbearable, you can use iodine povidone to wipe, to alleviate the symptoms. 2. Eczema: the skin is subjected to a variety of adverse stimuli, resulting in chronic eczema, so that the skin repeatedly crusting, crusting, itching, etc., the patient should keep the skin moisturized, the use of dexamethasone cream, tretinoin cream, tacrolimus ointment to relieve the symptoms, but also the use of ultraviolet therapy to assist in the treatment. 3. Neurodermatitis: patients should avoid external friction, scratching and other stimuli, and maintain a positive and optimistic mood. Compound menthol ointment and tretinoin injection can be used to relieve symptoms. At the same time, you can use light therapy and other auxiliary treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication. If the symptoms of itchy scabs and crusts are not relieved, you should go to the hospital in a timely manner, and give targeted treatment after clarifying the cause.