A lot of brown spots on the face are considered to be caused by freckles, chloasma, brownish green nevus, seborrheic keratosis, and so on. 1. Freckle: it is a pigmentation spot on the facial skin, which belongs to chromosomal dominant heredity and manifests as light brown to dark brown spots, which can be aggravated after sun exposure. 2. Melasma: it is caused by heredity, ultraviolet radiation, abnormal sex hormone level and other factors, resulting in light brown to dark brown hyperpigmentation spots on the prominent part of zygomatic bone, forehead and upper lip of patients. 3. Brownish-bronze nevus: it is a congenital non-genetic skin pigmentation disease, which mostly occurs in the zygomatic bone area of the patient, and the pigmentation spots are formed due to the pigmentation in the dermis layer. 4. Seborrheic keratosis: also known as age spots, is a benign tumor originating from the keratinocytes of the epidermis, the etiology of which is not yet clear, and is mainly manifested in the face, chest and back, as well as the back of the hands, and other skin appearances of yellowish or light brown flat papules or plaques. There are other causes of brown spots on the face, so it is recommended that patients go to the hospital in time to get a clear diagnosis and follow the doctor’s instructions for treatment.