Dust can be harmful to the human body by causing allergic reactions and inducing respiratory diseases. It is recommended to do a good job of personal protection, symptoms, timely medical treatment, targeted treatment. 1. Causes allergic reactions: people who are more prone to allergies may have allergic reactions due to the presence of more dust in the air, mainly coughing, itchy skin, redness of the skin, runny nose and other symptoms. 2. induced respiratory diseases: ① dust will carry many bacteria, viruses, insect eggs, etc. flying around, which can easily lead to bronchopneumonia and other diseases. ② industrial dust, fiber dust, etc. not only pollute the environment, but also make workers suffer from a variety of incurable occupational diseases, such as pneumoconiosis. Life, you can get up in the morning to open the window, in order to facilitate the ventilation of air; in the cleaning home health, do the necessary protective measures, such as wearing a mask, do not use a broom to vigorously Yang; in the home to prepare a humidifier and other methods, so that the air inside the house to become moist, to prevent dust is inhaled.