Lime water should not be eaten, eating lime water will cause harm to the human body. Lime water is calcium hydroxide solution generated by quicklime and water, calcium hydroxide is often used as a preservative, fungicide, is a high PH value of alkaline chemicals, corrosive effect on the skin, mucous membranes, taking will burn the esophageal mucosa, gastric mucosa and intestinal mucosa, resulting in sore throat, abdominal pain, vomiting blood, blood in the stool, and other symptoms, and in serious cases, can be life-threatening. Lime water is commonly used in pesticide preparation, insecticide and other agricultural purposes, and live pulp amputation, apical induction molding and other stomatological treatment. Lime water should not be consumed, if accidentally taken, it is recommended to go to the emergency department of the nearest hospital as soon as possible for emergency treatment such as gastric lavage.