Bronchial asthma is one of the most common chronic respiratory diseases, and its prevalence is increasing year by year in most parts of the world and has become a public health concern worldwide. Patients mostly present with recurrent episodes of wheezing and coughing, and severe attacks can result in respiratory failure leading to death. It is now recognized that the causes of asthma are mostly associated with inhalation of airborne antigenic substances such as pollen, dust mites, and viral infections, all of which are from respiratory factors. However, a growing number of studies have shown that diet is also an influential factor in the development of bronchial asthma. If the diet is not appropriate, it can trigger an asthma attack or worsen asthma symptoms. On the other hand, such as making appropriate dietary adjustments and maintaining good eating habits can help prevent asthma attacks and relieve asthma symptoms. Then for the majority of asthma patients, while paying attention to medication, they should not neglect their daily diet. Here we will talk about the following aspects of the daily diet of asthma patients: 1. Allergic food should be strictly prohibited food is also one of the triggering factors of allergic asthma, 6% C 8% of children and 1%-2% of adults will occur food allergy. In addition to symptoms such as vomiting and diarrhea, food allergies are often accompanied by bronchospasm and respiratory difficulties. The specific types of foods that can cause allergic reactions vary depending on the person’s body type. Common foods that may trigger asthma include dairy products, eggs, seafood, beans, peanuts, etc. These foods often contain high levels of allergens, which can easily trigger airway spasms. Asthma patients should carefully map out their dietary allergy patterns and should avoid allergenic foods to avoid triggering asthma attacks. For example, some people get asthma when they eat crab or drink milk, so they should avoid eating crab or milk. Asthma patients should also usually eat less fish, shrimp and other fishy foods, such as shrimp skin, shrimp, scallops, crabs, etc. 2, eat less salt, try to control the sodium intake in the diet. Bronchial asthma is very sensitive to salt, eating too salty food is easy to induce asthma, folk have been “eat salty good asthma” saying. During an asthma attack, eating too much salt will increase airway reactivity and make you more sensitive to external environmental changes; moreover, too much salt in the body will increase the viscosity of sputum, aggravate airway obstruction, worsen symptoms, and increase the dosage of medication. If salt intake is restricted, it will help to reduce asthma symptoms, so asthma patients should be given a low-salt diet, and should try not to eat or eat less pickles, sauces, salted meat and other products to reduce salt intake. 3, avoid eating irritating food and gas-producing food consumption of irritating food such as chili, pepper, mustard, curry powder, etc., easy to choke and cough, a very small amount of the above irritating food choked into the respiratory tract that will bring strong irritation to the respiratory mucosa, may induce tracheal spasm, aggravate asthma symptoms, so try not to eat. Gas-producing foods such as leeks and soybeans produce a lot of gas during digestion, resulting in abdominal distension, diaphragm upward, and restricted lung ventilation. Therefore, asthma patients should not eat more gas-producing foods. According to Chinese medicine, water chestnuts, white radish, red dates, lotus seeds, yams and other “smooth food” with the effect of strengthening the spleen and resolving phlegm, benefiting the kidneys and nourishing the lungs, can play a role in preventing asthma attacks and can be eaten appropriately. 4, should not eat too cold or too hot food ice cream, ice cream, cola, soda and other cold drinks and gas drinks in the summer most popular, but for asthma patients need to pay attention to eat as little as possible or do not eat. In addition to stimulating the gastrointestinal tract and causing indigestion, cold food can also easily trigger asthma. Artificially prepared aerated beverages contain more carbon dioxide gas, which is not conducive to lung ventilation. In addition, overheated or hot food can easily irritate the airways and cause coughing spells. Therefore, asthma patients should preferably eat warm food. 5, asthma patients should be prohibited from drinking alcohol drinking strong alcohol can immediately cause an asthma attack; even when drinking low alcohol, there can be a significant increase in respiratory resistance. This is due to alcohol stimulating the receptors on the mucosal surface of the trachea, through the vagus nerve reflex, causing the bronchial smooth muscle to contract and spasm and cause an asthma attack. Moreover, drinking alcohol can interfere with the respiratory center, making the patient sleep with irregular breathing or even respiratory arrest, which is life-threatening. Therefore, it is very dangerous for asthma patients to drink alcohol, especially before going to bed. 6, diet moderation, avoid overeating epidemiological data show that obesity is closely related to asthma, high incidence of asthma in obese people, serious symptoms, and poor drug efficacy. Therefore, overweight people need to pay attention to diet, try to reduce the intake of fat, increase physical exercise, to avoid excessive obesity. 7, eat more vegetables and fruits Vegetables and fruits are rich in vitamins. Vitamins can protect bronchial epithelial cells and reduce capillary permeability, promote inflammation, supplement vitamins can also enhance the body’s immune function, promote the body’s antibody formation and phagocytosis of white blood cells, reduce the symptoms of respiratory tract infection. In addition, beta carotene, vitamin C and E can play the role of antioxidant, which helps to clean up free radicals and other toxic substances. Some vegetables, such as radish and loofah, have the effect of lowering the air, resolving phlegm and clearing the lungs. This is very beneficial for asthma patients. In addition, our daily consumption of fruits and vegetables such as in apples, pears, berries, citrus and onions contains a large amount of soluble fiber, these dietary fiber can not be directly digested by people, need to be assisted by the natural presence of bacteria in the intestinal tract. These microorganisms take up the “soluble” fiber and ferment it to produce specific types of fatty acids. These fatty acids can interact with immune cells to help the body defend itself against asthma. 8, to drink more water, replenish water asthma symptoms, breathing faster, sweating more, the body’s water needs must increase, if not timely replenishment of water, can make the airway secretions become thick and sticky, difficult to discharge, aggravating airway obstruction. Drinking more water can supplement the loss of water during an asthma attack, keep the respiratory tract moist, dilute phlegm, and prevent the airway from being blocked by sticky phlegm. Drinking more water for a long time can dilute the local inflammatory substances in the airways and promote the discharge of inflammatory mediators such as leukotrienes and interleukins, thus reducing airway inflammation and improving asthma symptoms. In short, the diet of bronchial asthma patients should be light and less stimulating, but also need to pay attention to ensure the necessary nutritional intake, not overly restrictive diet, so that the body’s immunity is reduced, but not conducive to asthma control. There are skills in diet and eating is also a learning process. Choosing a reasonable diet according to your situation is very beneficial to prevent and control asthma.