There are more causes of symmetrical itchy skin on both legs, usually caused by diseases, common in daily life in eczema, neurodermatitis, ringworm, pruritus and other diseases: 1. Eczema: If the patient is exposed to allergens, resulting in eczema on the legs, symmetrical itching may occur, which can be accompanied by skin redness, papules and other symptoms, and the skin surface is dry and rough, and the itching may be aggravated in the autumn and winter seasons or after bathing The itching may worsen in autumn and winter or after bathing. In daily life to avoid contact with allergens, local topical drugs to relieve itching symptoms, but also oral drugs for systemic treatment; 2, neurodermatitis: neurodermatitis is mainly related to the patient’s mental stress, frequent scratching, frequent friction, the patient’s legs can appear mossy skin, there can be a little scales, accompanied by pruritus, can be symmetrical, but also unilateral appear. Patients should reduce psychological pressure and can be treated with oral or topical medication under the guidance of a doctor; 3. Tinea corporis: If the skin on both sides of the legs is infected with fungi, symmetrical itching of the skin on both legs may also occur, and the skin on the legs may appear as papules, papules, blisters, and red scaly patches with positive fungal tests, requiring the application of antifungal medication; 4. Pruritus: Patients may develop symmetrical itching of the skin on both legs. Then gradually expand to the whole body itching, scratching the skin after scratching scratches, blood scabs. Patients are advised not to scald with hot water, avoid frequent washing of the skin with soap and bath, and can often use emollient oils to moisturize the skin, and also use less irritating drugs to relieve itching symptoms.