With the popularity of nail art, many girls quickly fell in love with nail polish as a colorful cosmetic, and some are changing various nail polishes frequently. But it is important to note that while nail art, the hazards also follow. The nail polish on the body is common in the following points: 1, nail polish in the pigment is mostly toxic or heavy metal content exceeds the artificial color. The more toxic substances in ordinary nail polish are phthalate compounds, benzene, formaldehyde, acetone and so on. Among them, phthalate compounds can affect the development of reproductive organs, causing hormonal imbalance. The benzene and formaldehyde are carcinogenic substances; 2, long-term use of nail polish will cause nail dryness, deformation, pigmentation, and eventually lead to loss of nail luster. Severe cases may lead to nail enamel damage, leading to nail infection and gray nails; 3, in the process of using nail polish, which contains acetone, ethyl acetate and other substances volatilization will cause pollution of indoor air. These substances may cause damage to the nasal mucosa and nervous system, the human body inhaled these substances, often feel dizzy, nausea; 4, nail polish will have a lot of allergenic substances, may produce allergic reactions to some people, direct contact with the skin may cause allergic dermatitis; 5, nail polish contains phthalate is a colorless and odorless oily liquid, volatile good. It can enter the body through the skin, respiratory tract and digestive tract, accumulate in the fatty tissue, not easy to excrete. If used for a long time, the residual concentration of this substance in the human body is too high, it will harm the liver, kidney, cardiovascular and reproductive system and affect the endocrine function of the human body. To sum up, for patients with nail care needs, it is recommended to use natural coloring agents such as flower petals for nail care and reduce the use of nail polish and other nail products to avoid serious discomfort to the body.