If you drink citric acid descaler by mistake, if the amount is small, you can observe it, and at the same time, you can drink a moderate amount of water to promote the discharge; if the amount is large and there is obvious discomfort, you should immediately stop all activities, carry the outer bag of citric acid descaler and go to a regular hospital for consultation and treatment. Citric acid descaler itself is a weakly acidic liquid. If the amount mistakenly drunk is large, gastric lavage can be carried out in the hospital. After cleaning the stomach, the patient can eat some food that protects the gastric mucosa such as milk, porridge and egg white, or take medicines that protect the gastric mucosa (such as omeprazole, etc.) under the guidance of the doctor. If the patient accidentally ingests more citric acid descaler, he/she needs to have gastric lavage first, and needs to be hospitalized for observation if necessary.