Gastroesophageal reflux is a manifestation of digestive tract disease. Due to the stimulation of acidic substances in gastric juice, it can cause diseases such as esophagitis and upper respiratory tract inflammation. When gastric juice is inhaled into the airway, it can cause asthma attacks. Animal test results show that even a small amount of inhaled gastric juice can stimulate airway receptors and induce asthma. Among asthma patients, the incidence of gastroesophageal reflux symptoms is 45% to 60%; about 77% have symptoms of stomach burning, and about 55% have acid reflux. Any factor that can reduce the tension of the lower esophageal sphincter can aggravate reflux. However, about 23% of patients are asymptomatic, also known as "silent reflux."