When spring flowers bloom, many pollens are scattered and floating. When asthma patients come into contact with such substances, the lighter ones will have itchy eyes, nasal congestion, sneezing and runny nose, while the heavier ones can induce asthma attacks, allergic rhinitis, laryngeal edema, hives and other allergic symptoms. Most asthma patients are allergic, and they are often more sensitive than others to changes in the outside world. Sudden changes in temperature are a stimulus to the human body and can affect neurological, endocrine and immune functions, and children are less able to adapt to sudden changes in external temperature and are more likely to get sick. Therefore, the May Day period is one of the most visited seasons for asthma patients. Asthma is a chronic disease that can cause serious damage to individuals, families and society. Although asthma is not yet completely curable, reasonable preventive measures and medication can often bring the disease under control. Early preventive measures are even more important for patients who are prone to attacks in the spring. The best way to control an asthma attack is to prevent it. How can I prevent an asthma attack? You should pay attention to identifying and avoiding triggers, go to places where flowers and trees are abundant as little as possible, leave the place quickly in case of itchy skin, generalized fever, cough and shortness of breath in the wild, and take oral anti-allergy drugs such as paracetamol to control symptoms in mild cases. To effectively prevent asthma, the following 7 points are recommended: (1) Reduce the inhalation of pollen and smoke, and it is best to go out less in the daytime and after lunch. (2) Cockroaches are an important allergen, so pay attention to killing cockroaches in the house. (3) Reduce cat allergens and fungal inhalation, try not to keep cats, keep the room dry and well ventilated, and dry bedding regularly. (4) Pay attention to keeping warm and not to be exposed to cold air suddenly. (5) Inject influenza vaccine to prevent viral infection. (6) Avoid emotional excitement and maintain a good state of mind; strengthen physical exercise to enhance personal fitness. (7) Use sodium cromoglycate and glucocorticoid inhalation to prevent asthma before the onset season if necessary. Due to the complex etiology of asthma, the severity of the disease varies. If allergens can be eliminated, the attack of the disease can be significantly reduced, but patients with more severe disease also need to receive preventive medication based on inhaled glucocorticoids. Although spring is the most frequent season for asthma, as long as reasonable prevention and proper treatment are achieved, asthma can still be well controlled.