Acne on the back of the head may be caused by seborrheic dermatitis and folliculitis.
1. Seborrheic dermatitis: related to heredity, bad habits and other factors, there is chronic inflammation of the scalp, inflammatory factors will stimulate the sebaceous glands to increase secretion and manifested as more oil, oil blockage of the hair follicles, which can lead to the appearance of red pimples on the skin, accompanied by greasy, flaky, itchy and other symptoms.
2. Folliculitis: it may be caused by bacteria or fungi invading around the mouth of hair follicles, it is an inflammatory skin disease mainly manifested by hair follicle involvement, which will cause red follicular pimples and other changes in the skin, and in severe cases, pustules may appear.
The back of the head long acne may have other reasons, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, follow the doctor’s instructions standardized treatment.