Some causes of back acne are hormonal changes, heredity, environmental and situational factors and all other causes of acne found on other parts of the body. Hormonal changes cause the body to produce excess sebum, which often leads to clogged pores. Those with parents who suffer from acne are at great risk for developing acne themselves.
Environmental and situational factors lead to a condition known as "acne mechanica." This means that acne occurs in places on the skin that are aggravated by heat, pressure or friction. Acne mechanica is also caused by pollution and high humidity because these factors lead to clogged pores and breakouts. This condition is often seen on the backs of those who drive for long periods of time because of the pressure of the seat against the back. The pressure caused by the straps of heavy backpacks and the combination of tight clothing and heat are also causes of acne mechanica.
Reduce back acne breakouts by wearing breathable, loose-fitting clothing to help relieve pressure and friction on the skin. Using cleansers that contain at least 2 percent salicylic acid and benzoyl peroxide to dry up the excess oil on the skin help treat back acne breakouts.