Itchy bumps on the back may be caused by urticaria, contact dermatitis, eczema and other causes, which can be treated by local medication, oral medication and other measures. 1. Urticaria: a variety of causes of stimulation caused by the skin mucosa temporary increase in vascular permeability, causing limited edema, will lead to back bumps, accompanied by itching. It can be treated with local topical dexamethasone ointment, florazepam cream, glycerite lotion, etc., together with oral antihistamine drugs such as loratadine and cetirizine. 2. Contact dermatitis: The allergic reaction caused by the skin on the back coming into contact with sensitizers can also lead to itchy bumps on the back. You can use topical glycerine lotion, hydrocortisone cream and other drugs, while oral loratadine, chlorpheniramine maleate and other antihistamines. 3. Eczema: Inflammatory skin reactions caused by internal and external stimuli can also cause itchy bumps on the back. Zinc oxide ointment, glycerite lotion, boric acid solution and other drugs can be used externally. Severe itching can use ebastine, cetirizine and other antihistamines. Itchy bumps on the back may have other reasons, it is recommended to timely to the hospital, clear cause of the disease and follow the doctor’s instructions for treatment.