Asthma, known as bronchial asthma, is a disease caused by chronic inflammation of the airways. The causes of asthma include: 1. genetic factors: most asthma patients are related to family genetics; 2. allergies to pollen, artemisia, poplar wool in different seasons; 3. physicochemical factors: such as special working environments, chemical gases, etc.; 4. mold infections; 5. dietary factors: such as allergies to flour, cashew nuts, shrimp, seafood, etc.; 6. allergies to animal fur: such as the dander of kittens and puppies.