Itchy legs the more you scratch the more itchy may be caused by contact dermatitis, eczema, limited pruritus and other reasons. 1. Contact dermatitis: due to contact with certain irritants or allergens and lead to allergic reactions, clinical manifestations of itching, rashes, and the more you scratch the more itchy. 2. Eczema: Eczema occurs in the fall and winter, the season air is drier, the lack of moisture in the skin will appear flaking, itching and other symptoms. Itchy legs can also occur the more you scratch the more itchy symptoms. 3. Limited pruritus: the clinical manifestations of this disease are mostly itchy skin, and there will be more scratching the more itchy situation, mainly in the elderly, due to the decline in secretion function, the stratum corneum hydration ability to reduce, resulting in dry skin on the legs, the more scratching the more itchy phenomenon. There may be other reasons for itchy legs the more you scratch the more itchy, it is recommended that the patient should go to the hospital in time for examination, to clarify the cause of the disease and timely treatment.