Most of the home hair removal apparatus due to irregular and incorrect operation and use practices, or no good post-operative care resulting in side effects and hazards, the specific are as follows: 1, pain: such as the use of laser hair removal Tria Laser, in the use of the process will produce pain, because Tria use laser hair removal, and the laser relies on light to heat heat to damage the hair follicle, feel the pain of the nerve endings in the The nerve endings that feel pain are distributed in the epidermis and hair follicles, so there will be a slight tingling sensation when using the hair removal instrument; 2, pigmentation: human body hair can play a role in blocking some of the ultraviolet rays to protect the skin, after using the home hair removal instrument hair removal, most of the body hair is removed, such as not paying attention to sun protection, ultraviolet rays are too strong and easy to harm the skin of the hair removal area, thus causing pigmentation. In addition, if not regular use of home hair removal instrument, may cause skin burns, resulting in skin melanin deposition, skin tone deepening; 3, blister: some people use home hair removal instrument after the blister, generally appear in the case of not using FDA approved products. If you buy the “three no” home hair removal instrument, it is very likely to cause the problem of poor quality and settings of the instrument, and lead to blisters after hair removal. Mild blisters can disappear on their own, while severe blisters may cause infection and scarring. Therefore, avoid the use of “three no” home hair removal instrument, must be purchased in the regular manufacturers.