Varnish is a synthetic resin, belonging to the varnish, more harmful to the human body, long-term exposure may cause insomnia, induced respiratory diseases, induced skin diseases and so on. 1. Cause insomnia: many people are sensitive to the ingredients of varnish, if long-term exposure may appear dizziness, headache symptoms, not timely improvement of the environment will affect the sleep, which leads to insomnia, restless sleep. 2. Induce respiratory diseases: varnish contains some toxic chemical elements, if long-term living in the environment with varnish, inhaling a lot of toxic gases, it may affect the respiratory system, thus inducing a series of respiratory diseases, including bronchitis, bronchopneumonia and so on. 3. Induce skin diseases: some people are allergic to the components of varnish, so after contact may produce an allergic reaction, easy to induce skin diseases, manifested as red, itchy skin, rashes. If the room decoration requires the use of varnish, it is recommended to ventilate the room for a period of time until the odor disappears completely before moving in. If there is any adverse reaction during this period, you should seek medical advice.