Men’s zygomatic area skin darkening may be physiological reasons such as not pay attention to sunscreen, there may also be pathological reasons such as face and neck follicular erythema nigricans, post-inflammatory hyperpigmentation, Ruier nigricans and so on. 1. Physiological reasons: if the patient does not pay attention to sunscreen, long-term stimulation by ultraviolet light, can lead to men’s zygomatic bone parts of the two sides of the skin black. 2. Pathologic causes: (1) face and neck follicular erythema nigricans: this disease is mostly seen in young men and may be related to heredity, the lesions often start in front of the ear and slowly develop to the lower part of the ear, the back of the ear and the neck, which manifests itself as a capillary dilatation of brown pigmentation with white papules in the middle. (2) Post-inflammatory hyperpigmentation: It is the pigmentation of the skin that occurs after the inflammatory process, and can occur in all parts of the skin. The lesions are mostly light brown to dark black in color, with clear boundaries, and only appear in the inflamed parts of the skin, and usually fade away after a few weeks or months. (3) Reel melanosis: this disease may be caused by long-term sun exposure and other factors, at first the skin has mild itching, erythema, followed by hyperpigmentation, the border is not clear, the pigmentation is from light to dark, can be presented as light brown, brown, dark brown, and so on. There are many reasons why men’s skin on both sides of the cheekbone area is dark, it is recommended to go to the hospital, to clarify the cause of the disease, and under the guidance of the doctor to carry out active treatment.