There are many symptoms that lead to itchy legs and arms, and the common ones mainly include the following causes: 1. If the symptoms of itching only appear locally, and there are no local lesions such as erythema and papules, clinically it is mainly considered to be pruritus, which may be caused by medical diseases such as leukemia or renal failure, and can be treated symptomatically by taking antihistamines such as cetirizine hydrochloride tablets orally and using topical stove glycol lotion. 2, legs and arms itching, may also be caused by local skin eczema, in addition to itching symptoms, there are usually local erythema, papules, papules, flaking and other rashes, can be treated with topical glucocorticoid ointment, zinc oxide borate ointment and other topical application. 3, urticaria, in the itching symptoms at the same time, there are also wind masses of varying sizes, the rash can quickly appear, can be self The rash can appear quickly and can subside on its own. You can take anti-allergy drugs such as loratadine orally and treat with topical glyburide lotion.