Multiple small red spots on the back with peeling and stinging are considered to be acne, folliculitis or contact dermatitis, which can be relieved by medication and other means. 1. Acne: Acne is a chronic inflammatory disease of the sebaceous glands of the hair follicles, lesions can occur on the cheeks, back, shoulder blades or trunk, the first choice of drugs are retinoids, such as adapalene gel, tazarotene gel, etc., and oral isotretinoin. If the infection is serious, you can also use topical clindamycin gel, or oral doxycycline. 2. Folliculitis: Bacterial or fungal infection after skin damage can lead to folliculitis. If it is bacterial infection, you can use fusidic acid cream, mupirocin ointment and so on; if it is fungal infection, you can use miconazole cream and so on. Serious cases can be combined with oral sensitive antibiotic medication. 3. contact dermatitis: skin contact with allergens, can cause local allergic reactions, need to follow the doctor’s instructions for the external use of dexamethasone cream, mometasone furoate cream, etc.; if the combination of infection, the need to anti-infection treatment, such as external mupirocin ointment, or oral amoxicillin and so on. It is recommended that patients with multiple small red spots on the back peeling and stinging go to the hospital in a timely manner, after the cause of the disease is clear, under the guidance of the doctor to use the correct medication, not to use their own random medication.