Induced vomiting may lead to gastric mucosal damage, esophageal and pharyngeal damage and anorexia nervosa. 1. Damage to gastric mucosa: Usually when vomiting, the pressure inside the stomach will increase, which will lead to spasm of the stomach wall and may cause damage to the gastric mucosa. 2. Esophageal and pharyngeal damage: gastric juice is actually a kind of strong acid, usually the gastric mucosa can resist the corrosion of gastric juice, but the esophageal and pharyngeal mucosa can not resist the corrosion of gastric juice. It is possible to damage the esophageal and pharyngeal mucosa by inducing vomiting. 3. Anorexia nervosa: For patients with prolonged emesis, the desire for food and the fear of calorie intake are intertwined. Over time, this conflict can lead to psychological abnormalities and the formation of anorexia nervosa. Patients are advised to change the bad habit of hyperventilating. If patients experience the above consequences, they should seek prompt medical attention and allow professional doctors to carry out the relevant treatment and therapy.