Asthma is a chronic allergic inflammation of the respiratory tract that causes breathing difficulties, but there is a type of “asthma” that is caused by gastric disease: gastroesophageal reflux “asthma”. As the name suggests, asthma or asthma-like manifestations are caused by gastroesophageal reflux, which is an extraesophageal manifestation of GERD, mainly through reflux of gastric contents into the laryngopharynx and irritation of the trachea triggering bronchospasm. According to the literature, about 50% to 80% of asthma patients are associated with GERD, and a significant proportion of them are directly caused by GERD, and this group of patients can completely eliminate their fatal asthma symptoms with proper anti-reflux treatment. In recent years, among the nearly 10,000 patients seen at the GERD Center of the Second Artillery General Hospital, in addition to digestive symptoms such as acid reflux and heartburn, more than 2/3 of them also have respiratory symptoms such as cough and asthma, and these patients have long been treated as simple allergic asthma, with counterproductive results. Gastric acid reflux into the esophagus and then continues to run down the throat can cause a foreign body sensation in the pharynx, resulting in hoarseness and repeated coughing, and even reflux asthma and respiratory tract damage. The complex and varied symptom presentation of this disease, coupled with a completely normal gastroscopy in half of the patients, makes it often mistaken for a respiratory disease. Patients with asthma should pay attention to whether their attacks are closely related to their diet, whether they have symptoms that worsen or trigger “asthma” when lying down or bending over, and whether they have upper gastrointestinal tract diseases such as pancreatic dystrophy and gastroduodenal ulcer. If one of these conditions is present, it is very likely that the “asthma” is caused by GERD. If you have a chronic cough, coughing and asthma with symptoms such as acid reflux and heartburn, you should consider whether it is caused by gastroesophageal reflux disease, which is very common but rarely detected in time and is not easily detected.