Hiccups, clinically known as erratic reflux, are a common physiological phenomenon caused by spasmodic contraction of the diaphragm, which means that the gas reverts upward from the stomach and makes frequent sounds in the throat. It can be caused by a variety of factors, such as diet, mental, environmental or pathological factors, etc. A transient retrograde can also occur in healthy people. I. Physiological factors: 1. dietary factors: mostly related to diet, especially eating too fast, too full, ingesting very hot or cold food and drinks, including eating some foods that produce more gas, such as sweet potatoes, potatoes, carbonated drinks, etc., which can produce a lot of gas after entering the stomach and expelled by way of erratic; 2. mental factors: excessive tension can lead to exchange nerve excitement, causing diaphragm spasm, thus 3, environmental factors: external temperature changes and excessive drinking and smoking can also cause erratic. Pathological factors: 1. Central diseases: loss of inhibition of the ergative reflex arc, organic lesions in the brain, such as brain tumors, metabolic lesions such as uremia, alcoholism, and other diseases such as multiple sclerosis; 2. Peripheral diseases: stimulation of the centripetal path of the ergative reflex arc. The stimulation of phrenic nerve includes mediastinal tumor, esophagitis, esophageal cancer, thoracic aortic aneurysm, etc. Stimulation of the vagus nerve includes gastric dilatation, gastritis, gastric cancer, pancreatitis, etc.