Itchy back with small bumps, common causes of eczema, Malassezia folliculitis, etc., you can use topical mometasone furoate cream, such as ketoconazole cream, etc. to carry out treatment. 1. Eczema: manifested in the back skin pimples, papules, accompanied by intense itching symptoms, can be used topically glucocorticoid cream, such as mometasone furoate cream, with anti-inflammatory, anti-allergic, anti-itch and other effects. Severe symptoms can be oral antihistamine drugs, such as loratadine. 2. Malassezia folliculitis: manifested as hemispherical follicular papules on the surface of the skin, accompanied by varying degrees of itching, can be localized topical antifungal drugs, such as ketoconazole cream, with antibacterial, antipruritic effect. If the symptoms are more severe, oral itraconazole capsules can be combined. Itchy back with small bumps may also have other causes, it is recommended to go to the hospital, clear cause, follow the doctor’s instructions for treatment. During the treatment period, the diet should be light, do not eat spicy and stimulating food, and do not scratch the affected area, so as to avoid rupture, secondary infection. All of the above medications should be used under the guidance of a doctor, do not self-medication.