The appearance of more bumps on the back is a common skin disease, mostly due to poor cleaning leading to mite breeding, improper diet, frequent late nights and other factors that cause excessive sebum secretion accumulation in the mouth of the hair follicle caused, generally by improving bad habits can be improved. Also consider whether acne, folliculitis, the need to use drugs for treatment.1, physiological factors and bad habits: the body’s immune function or often eat spicy, stimulating, fried food, long-term late night or sleep deprivation, back cleaning is not in place, or more oil secretion leads to back mite breeding and other factors can lead to the emergence of flaky or lumpy bumps on the back. Generally, by controlling the intake of such foods, avoiding late nights, changing clothes regularly, keeping the back clean and dry, and using mite soap for cleaning can be improved, if the effect is not obvious or the symptoms worsen, it is finally recommended to go to the hospital for standardized treatment; 2, acne: mostly in adolescents, due to the increase in androgen levels or relatively high, resulting in excessive oil secretion, excessive keratinization of the follicle sebaceous gland opening, and As a result, oil cannot be discharged normally and accumulates at the mouth of the hair follicle to form acne. This can be treated with oral antibiotics such as doxycycline, minocycline, and isotretinoin. 3. Folliculitis: Since the back is an area rich in sebaceous glands, and also an area with more sweating, a large amount of sweat and sebum can easily block the mouth of the hair follicle, resulting in folliculitis secondary to infection. Mild folliculitis will usually subside on its own and generally requires only observation or home cleaning treatment, but a larger number of folliculitis often requires treatment with medication.