The 1 to 2 um, tetrahedral silica dust is the most pathogenic. Pulmonary silicosis, referred to as silicosis, is a disease caused by long-term inhalation of large amounts of free silica dust, which is deposited in the lungs. People who are exposed to dust for a long period of time, such as miners, construction workers and glass factory workers, are susceptible to this disease. The important factor is the size of the particles, generally speaking, the smaller the dust particles, the stronger the disease-causing ability, of which 1 ~ 2um dust cure the strongest disease-causing ability, easy to be inhaled into the lungs to form nodules. Silica lung is mainly due to the cause of human inhalation of free silica dust in the air, when the amount of inhaled dust is too much, more than the lungs can remove the maximum limit, the dust will gradually be deposited in the lungs. Among the different shapes of silica crystals, tetrahedral quartz crystals have the strongest ability to cause fibrosis. If you feel unwell, seek medical attention.