Vomiting isn't the only reason.

Vomiting is a disease caused by stomach dysfunction and qi inversion, forcing stomach contents to spit out from the mouth. It is more common in a variety of diseases, such as nervous vomiting, acute gastritis, cardiogenic vomiting, gastric mucosal prolapse, pyloric spasm, pyloric obstruction, cardiac spasm, duodenal stasis, etc., and other diseases such as intestinal obstruction, acute pancreatitis, acute cholecystitis, and brain diseases can be manifested as vomiting. Traditional Chinese medicine believes that vomiting is common because: 1. Exogenous pathogens invade the lung, feeling wind, cold, summer heat, dampness, dryness and fire. The six pathogenic factors invade the stomach organs, causing the stomach to lose harmony and descend. 2. Unclean diet, excessive diet, overeating and eating too much to produce cold can cause the stomach qi not to descend. 3. Emotional disorder, liver disorder, transverse invasion of the stomach and upward inversion of stomach qi. 4. Deficiency of the body after illness, deficiency of spleen and stomach elements or weakness after illness, excessive fatigue and exhaustion of qi can cause spleen deficiency unable to generate essence, and vomiting due to upward inversion.