Cheek spots, also called chloasma, mainly appear as light brown or dark brown patches on the face without conscious symptoms. Only a very small number of cheek spots are caused by bad liver, most of them are caused by other reasons, but the specific causes are not clear, the common causes are as follows: i. genetic factors, some patients have family history; ii. pregnancy, which may be related to the increase of estrogen level after pregnancy; iii. gynecological diseases, such as menstrual disorders, uterine fibroids, pelvic inflammatory disease, etc.; iv. sun exposure, the disease is aggravated in summer and reduced in winter, which is closely related to ultraviolet radiation; v. oral contraceptives; vi. cosmetics; vii. It is closely related to ultraviolet radiation in winter; v. Oral contraceptives; vi. Cosmetics; vii. Other factors, such as long-term alcohol abuse, taking photosensitive drugs, etc.