Gastric lavage can be performed through emetic gastric lavage and gastric tube gastric lavage. 1. Emetic gastric lavage: this is mainly for patients who are in good physical condition and awake, and can be performed by taking gastric lavage liquid orally, using tongue depressor to stimulate the patient’s throat to cause the vomiting reflex, and repeating the procedure until all the stomach contents are cleaned. 2. Gastric tube gastric lavage: The main purpose is to insert the gastric tube directly into the stomach from the patient’s nasal cavity and oral cavity, suck out the toxic substances first, and then inject gastric lavage liquid through the gastric tube to eliminate all the gastric contents, so as to achieve the effect of removing toxins in the stomach. Gastric lavage should be performed under the supervision of a doctor. When gastric lavage need to pay attention to gastric ulcer, gastric perforation and other diseases patients should be cautious of gastric lavage, so as not to aggravate the condition.