Freckles on the face of small children may be related to genetic factors, sunshine and so on. 1. Genetic factors: Heredity is the main cause of freckles. Freckle is an autosomal dominant disease with family aggregation. People with family history are prone to freckles, especially those whose parents suffer from freckles (if one parent has freckles, the possibility of children developing freckles is 1/2; if both parents have freckles, the possibility of children developing freckles is 3/4). 2. Sun exposure: sun exposure can induce or aggravate freckles, which occur in exposed areas (such as face) that are often exposed to sunlight. Exposure to sunlight or prolonged exposure to ultraviolet rays can easily trigger the disease. Sunlight exposure is an important factor for the occurrence of freckles, and most of the non-sunlight-exposed areas do not have freckles. 3. Other influencing factors: such as gender, race, age, some bad habits may aggravate freckles. Children with freckles are recommended to go to regular hospitals in time for consultation and standardized treatment under the guidance of specialists.