Asthma triggers, that is, factors that can lead to an acute asthma attack, mainly include: 1, infection, viral, bacterial, mycoplasma and other infections can trigger asthma, with viral infections being an important cause of asthma attacks. 2, non-specific irritants: dust, room dust, mites, pollen, animal fur, mold, human epithelial debris, plant fibers, metabolites of mold or bacteria, food residues, etc., smoke (especially cigarettes), a variety of volatile chemicals (paint, spices, cosmetics, gasoline, kerosene, insecticides, cleaning agents, and industrial organic dust, etc.. 3, climate change: the high and low air pressure and humidity changes in size, cold air can trigger an asthma attack. 4, strenuous exercise: especially in the cold and dry air for exercise. 5, food: eggs, peanuts, and fish and shrimp, and diet too sweet or too salty can cause asthma attacks, and even chocolate, cold drinks, etc. can also trigger asthma, food allergy-induced asthma is generally not lifelong, with the age of the probability of its onset will gradually decrease. 6.Drugs: such as aspirin, anti-inflammatory pain, insulin, beta-blockers, penicillin, local anesthetics, iodine oil contrast agents, sulfonamides, furan preparations, various protein preparations, serum preparations and certain aerosols, etc.