The main factors of bronchial asthma attacks include genetic factors, allergenic factors, and medication factors. Bronchial asthma is a polygenic genetic disease, and if there is a patient with bronchial asthma in the family, the chance of having bronchial asthma in person is relatively high. In addition, an important factor is allergens, i.e., allergens. Allergens are divided into outdoor allergens and indoor allergens, as well as occupational allergens. Indoor allergens are mostly seen in dust mites and fungi, outdoor allergens tend to be more common in pollen and grass pollen, and occupational allergens are animal fur and wood. There are also drug factors, such as non-steroidal drugs aspirin and drugs such as betalactam, which may trigger bronchial asthma. Besides, exercise factors, obesity factors, smoking, atmospheric pollution, respiratory infections, etc., are also factors of asthma triggering.