The back is particularly itchy with small raised packets, which may be caused by eczema-like dermatitis, urticaria, acne and other diseases. It is recommended to pay attention to patient care, the use of antihistamines, glucocorticoids, anti-infective drugs to regulate. 1. Eczema-like dermatitis: usually based on bacterial infectious disease foci, there is an allergic reaction. It leads to localized erythema and blisters with intense itching. Loratadine and Olopatadine hydrochloride can be given to relieve itching. If accompanied by bacterial infection, levofloxacin, amoxicillin, cefadroxil and other drugs can be given to control the infection. 2. Urticaria: The cause of urticaria is complex, and is considered to be related to environmental changes, medical history, life history and other factors. It may lead to the appearance of the skin, erythema with itching. Oral loratadine and levocetirizine hydrochloride can be given to help relieve itching. Biologic agents such as omalizumab are given for chronic urticaria. 3. Acne: The cause of acne is complex, and can occur on the face and neck, shoulders, chest and back, resulting in localized inflammatory papules, and the inflammatory reaction leads to localized itching. Erythromycin ointment and fusidic acid ointment can be given to control the infection. If accompanied by allergic reactions, chlorpheniramine maleate, ketotifen and other drugs can be given to relieve allergic symptoms. To summarize, there are more reasons that lead to back pouching and itching. It is recommended to pay attention to the care of the affected area, do not scratch the stimulus, if necessary, go to the hospital dermatology department, follow the doctor’s instructions targeted treatment, do not self-medication.