Causes of freckles on the face include genetic factors, sun exposure, and poor lifestyle habits. Freckle is a kind of brown dotted pigmentation spot commonly found on the face. 1. Genetic factors: the disease is autosomal dominant, with the phenomenon of family aggregation, that is, the susceptibility of family members of patients increases. 2. Sunlight exposure: long-term exposure to ultraviolet rays will induce the occurrence of the disease, and freckles are mostly found in the parts directly exposed to ultraviolet rays, while non-sunlight-exposed parts usually do not have freckles. Therefore, the symptoms may be aggravated in spring and summer, and reduced in fall and winter. 3. Bad living habits: Freckles can be induced by staying up late, facing electronic screens, not cleaning the face in time, etc. If you find freckles on your face, you should take care of yourself. If you find freckles on your face, first of all, you should avoid sunshine and use sunscreen when you go out, and patients with serious symptoms are recommended to seek medical treatment in time and under the guidance of professional doctors.