Citric acid descaler is generally non-toxic material, after accidental ingestion, such as stomach upset, pain, vomiting phenomenon, you need to go to the emergency department of the hospital for gastric lavage and other further treatment. The main ingredient of citric acid descaler is citric acid, citric acid is a food-grade raw material, also a kind of food additives, non-toxic effect on human body. Citric acid is a kind of weak acid, which can have a chemical reaction with calcium carbonate, a component of limescale, and dissolve the limescale. Citric acid descaler contains a high concentration of citric acid, if accidentally ingested, you should drink a lot of water to dilute the solution, in order to reduce the acid on the stomach stimulation. If there is no obvious discomfort after treatment, it can be temporarily observed; if after drinking a lot of water, you still feel stomach discomfort, pain and vomiting phenomenon, you need to go to the emergency department of the hospital for gastric lavage and other further treatment.