Itchy calves, the more you scratch the more itchy may be due to urticaria, atopic dermatitis, eczema and other causes. 1. Urticaria: Common causes include food, infection, drugs, respiratory inhalants and skin contacts. Physical factors, mental and endocrine factors and genetic factors can also lead to the occurrence of urticaria. Patients often suddenly realize that the skin itches, and soon appear in the itchy parts of the size of the red red air masses, the more the patient will scratch the more itchy. 2. Atopic dermatitis: a chronic inflammatory skin disease associated with genetic allergic qualities, manifested as polymorphic lesions and oozing tendency, often accompanied by asthma, allergic rhinitis, itching is intense, the more the lesions scratching the more itchy. 3. Eczema: Eczema is caused by a variety of internal and external factors in the superficial dermis and epidermal inflammation, clinically acute lesions to herpes mound, with a tendency to ooze, the chronic phase to the moss-like changes, easy to recur. The lesions show erythematous scaling with itching. Itchy calves, the more you scratch the more itchy reasons, it is recommended to go to the hospital for examination, to identify the cause of the disease and timely symptomatic treatment.