There are many hazards of emesis, such as water-electrolyte disorders, cardia-esophageal mucosal tears and esophagitis. 1. Water and electrolyte disorders: the process of vomiting can lead to the loss of water and electrolytes, which may lead to water and electrolyte disorders in the body. 2. Tearing of mucous membrane of cardia esophagus: when vomiting, stomach contents enter into spasm of esophagus, coupled with diaphragmatic contraction, it is the pressure in the terminal esophagus increases dramatically and causes the mucous membrane of cardia to be torn. 3. Esophagitis: When vomiting, stomach acid mixed with food is spit out through the esophagus, and long-term vomiting can lead to esophagitis due to long-term stimulation of the esophagus by stomach acid. At the same time, long-term vomiting may induce relaxation of the cardia, which may cause reflux of gastric contents and lead to reflux esophagitis. There are many other hazards of emesis, it is recommended to go to a regular hospital, consult a professional doctor, cooperate with the doctor to complete the relevant laboratory tests, and actively deal with it.