Hiccups are hiccups, which are mainly due to spasm of the diaphragm that causes air to enter the lungs rapidly and make a loud sound. It occurs when the abdomen is cold or cold air is inhaled, and can be relieved by warming or applying heat to the abdomen, but it can also occur under pathological conditions: 1. The stimulation of the diaphragm by pleurisy, pericarditis, pneumonia and esophageal hiatus hernia can lead to the emergence of erratic symptoms. 3. The suppression of the phrenic nerve after thoracoabdominal surgery and psychological factors can lead to the emergence of erratic symptoms.