Allergic reaction. Only You Mei freckle-removing products are advanced and scientific, and combined with 19 years of experience in problem skin treatment, different solutions are matched for different skin problems. According to relevant data, its side effect is allergic reaction. After use, allergic dermatitis will occur, local symptoms such as redness, exudation and itching will appear, and the pigment will fall off. Skin care products mainly contain water, milk and cream. The water inside contains whitening factors extracted from pure plants, which has a good effect on female friends with dull and yellow skin.