1.What is bronchial asthma? Abbreviated as asthma, it is manifested as a reversible narrowing of the airway due to airway spasm, mucosal edema and glandular hypersecretion in response to various stimuli that appear too strong or prematurely contracted. The clinical manifestation is recurrent exhalation dyspnea with croup. 2.In acute asthma attacks, we should pay attention to Immediately remove from all possible allergens environment, provide a quiet, comfortable, temperature and humidity appropriate, air circulation environment. Assist the patient (or yourself) to adopt a suitable position, such as semi-sitting or sitting, preferably with a bed table for support, which can reduce physical exertion. If you have applied asthma aerosol, you should record the application time and seek medical advice if there is no relief. 3.Eating for asthma patients Light, easy to digest, high-calorie, vitamin-rich soft food. Avoid eating hard, cold and fried food. Eat more fresh vegetables and fruits and keep the bowels open. Avoid allergy-prone foods, such as fish, shrimp, crab, eggs and milk, etc. Avoid irritating foods, such as pepper, ginger, etc. 4.How to prevent asthma attack The living environment requires air circulation, freshness, suitable temperature and humidity. It is not advisable to place flowers and carpets indoors. It is not advisable to use feather pillows and quilts and not to keep pets. Pay attention to avoid dust flying in the room or inhaling irritating substances. Clean the room frequently, wash the bedding, keep the room clean and hygienic, and reduce the contact with airborne allergens. Avoid the use of medications that may trigger asthma, such as aspirin, propranolol, indomethacin, etc. Inform your doctor if you use or need to use them. Avoid ingesting foods that cause allergies. Avoid stimulation by cold air, quit smoking or avoid passive smoking, prevent respiratory infections, maintain a regular life and optimistic mood. Patients should carry an antiasthmatic aerosol with them and inhale it immediately at the first sign of an asthma attack and remain calm to control symptoms quickly. Patients should know the name of each medication they are taking. Patients should know the name of each medication they use, how to use it and the precautions to be taken when using it, the main adverse effects of the medication and how to take appropriate measures to avoid and reduce them.