呕吐是指胃和一部分小肠内容物通过食管逆流出口腔的一系列动作。引起呕吐的原因有:①机械的和化学的刺激作用于舌根、咽部、食管、胃、大小肠、胆总管、腹膜及泌尿生殖器等处的感受器;②视觉和内耳前庭器官受刺激(如车、船摇摆);③颅内压增高(如脑瘤、颅脑损伤和脑膜炎等);④注射催吐药(阿朴吗啡);⑤精神紧张。 Vomiting refers to the stomach and part of the contents of the small intestine through the esophageal reflux out of the mouth a series of actions. Cause of vomiting are: ① mechanical and chemical stimuli on the tongue, pharynx, esophagus, stomach, intestine, common bile duct, peritoneum and genitourinary receptors; ② visual and inner ear vestibular organs are stimulated (such as car , Ship sway); ③ increased intracranial pressure (such as brain tumor, head injury and meningitis, etc.); ④ injection of emetic (apomorphine); ⑤ mental stress.