Patients with asthma often have attacks after exposure to allergens, including pollen, dust mites, and animal dander. Some attacks are triggered by exposure to cold air, exercise, or emotional stress, and are often characterized by shortness of breath. Mild asthma attacks are mainly characterized by shortness of breath after activity. Patients often feel very tired after walking up stairs, up a blocked slope or walking briskly, and need to stop and rest in order to slowly relieve themselves. In severe cases, patients with asthma attacks, often unable to move, even dressing, eating, and going to the toilet will have obvious shortness of breath symptoms. Patients with asthma also have atypical symptoms during an attack, such as coughing and chest tightness. A part of patients do not have obvious wheezing symptoms, but only show coughing. These patients have coughing for a long time, and when they go to the hospital to perform chest X-ray, there are no obvious lesions in the lungs. After conventional cough treatment, the symptoms are not relieved well, and then we should consider whether there is bronchial asthma. There are also some patients who do not have wheezing symptoms and mainly present with chest tightness. After such patients are seen in cardiology and heart disease is ruled out, it is also necessary to consider whether there is a possibility of chest tightness variant asthma.