Hair removal spray is suitable for people who are afraid of pain and whose skin is not easily allergic. Its principle is mainly to use chemical substances to dissolve hair, and it can generally be used for underarms, limbs and other parts of the body. When choosing hair removal products, the choice is mainly based on skin type. A moderate amount of use can restore a smooth surface to the skin, improve the embarrassment of hairiness and trim the beauty of the legs. But it is not recommended to use often, the hazards are as follows: 1, skin allergies: the chemical composition contained in the skin irritation, frequent use is easy to stimulate the skin, so that the skin’s stratum corneum thinning, prone to rash itching, and even cause contact dermatitis; 2, hair thickening: hair can not be completely removed, can only dissolve the hair on the surface of the skin, leaving a thick hair stem, epidermis visible small black spots. Can not achieve the effect of real hair removal, but will stimulate the hair follicle, so that the hair grows more coarse and black; 3, pigmentation: frequent users can block the pores, serious can lead to inflammation of the hair follicle, keratinization rough, pigmentation, etc.; 4, hair growth fast: remove body hair parts will probably grow new hair after three days; 5, rough skin, dry.