Itchy back may be caused by dry skin, allergy, eczema, ringworm, pruritus, folliculitis and other factors. It is recommended to pay attention to moisturizing, give glucocorticoid, antihistamine, antifungal, antipruritic, anti-infection drug treatment. 1. Dry skin: usually do not pay attention to skin care, often in the external environment, resulting in dry, itchy skin. It is recommended to pay attention to skin care, increase water intake, can help relieve. 2. Allergy: patients with allergies come into contact with allergens, causing an immune response that leads to itchy back. It is recommended to detach from the allergens, use topical glycerine lotion, oral loratadine, etc. to help relieve the itching. 3. Eczema: Eczema is an inflammation of the skin caused by various factors, which may cause pimples and itching. You can apply topical hydrocortisone cream and halometasone cream externally to relieve the inflammatory reaction. 4. Ringworm: ringworm is caused by fungal infection, which can also cause itchy skin, and can be treated with topical terbinafine cream, ketoconazole cream, and oral itraconazole capsules if necessary. 5. Pruritus: Pruritus can also cause itching, it is recommended to identify the cause, actively remove the triggers, topical glycerite lotion treatment. 6. Folliculitis: Folliculitis is caused by bacterial infection and may lead to itchy skin. It can be treated with topical fusidic acid, mupirocin and compound polymyxin B ointment. Itchy skin on the back, it is recommended not to scratch the stimulus, to avoid inducing infection. It is recommended to pay attention to local hygiene, if necessary, go to the hospital dermatology department for diagnosis and treatment, the above drugs are used as prescribed by the doctor.