The causes of freckles may be related to heredity, constitution, exposure, increased skin pH and endocrine disorders. The formation of freckles, most freckles patients are in childhood freckles. If parents have freckles, children are more likely to be born with freckles. Ultraviolet rays in the sun are also the killer of freckles. The formation of freckles, under the irradiation of the sun, the number of freckles is easy to increase and the color will deepen, so freckles are also called "summer spots". Therefore, some patients will feel that their freckles are more obvious in summer and will fade in winter. Guidance: freckles grow on your face, so it is best not to drink coffee, because caffeine in coffee can actually precipitate spots easily. Eating more fruits and vegetables also helps to remove spots.