Reason Of Pimple On Back. The most common reason for this problem is the blocking of the hair follicle which leads to other symptoms like itching pimples and in worst cases it can even take shape of the cysts too. While back acne aka bacne is totally normal it may leave you feeling insecure from time to time.

Acne is basically hormonal in nature. When excess sebum combines with bacteria and dead skin cells it can clog up your pores and create pimples on your back. It usually occurs with an acne on the face and chest and shoulder.
Skin conditions and scalp skin irritation may trigger the hair follicle disturbance causing pimple-like bumps or even the rashes and besides male example hairlessness in some unique areas.
Acne is caused by blocked skin pores either due to oil dirt or even bacterial invasion. In addition factors such as pollution heat and humidity aggravates the problem. If you hit your head on a hard object you may experience a head injury. Dandruff which means flaking of dead skin of the scalp when falls on the back results in acne on the back and shoulders.