A raised hard pack on the back can be treated with topical erythromycin ointment and mupirocin ointment if it is a bacterial infection; and ointment such as benzoyl peroxide gel and adapalene gel if it is acne. 1. Bacterial infection: Bacterial infection caused by folliculitis, or boils caused by the tissue around the hair follicle, will cause a raised hard bag on the back, can be treated with topical erythromycin ointment, mupirocin ointment and other antibiotic drugs. 2. acne: androgen secretion is vigorous, the follicle secretion increases, will cause acne, may cause the back to grow a raised hard pack, can use benzoyl peroxide gel, adapalene gel, can play a contraction of the follicle, inhibit the role of gland secretion, but also can prevent the follicle hyperkeratosis. The back of a raised hard pack, may also be other causes, should go to the hospital in time to check, clear cause of the standardized treatment in accordance with the doctor’s instructions, the drug needs to be used under the guidance of a professional doctor.