The formation of freckles can be caused by genetic factors, light and other factors such as gender and skin color.
1. Genetic factors: Freckles are mainly caused by genetic factors, which are mostly autosomal dominant, and the onset of freckles may have the phenomenon of family aggregation. If one or both parents suffer from freckles, it may be inherited to children.
2. Light: light can affect the external performance of freckles, if sunlight exposure or ultraviolet radiation can cause freckles. It will also make the melanocyte form bigger and the melanin production ability enhanced, which will make the color of freckles deepen and the form bigger, and so on.
3. Other factors: For gender, the risk of female is higher than that of male. In addition, light skinned people are more prone to the disease, such as Caucasians are often prone to the disease.
It is recommended to go to the dermatology department of the hospital for examination and treatment after clear diagnosis.