Different types of desiccants can cause different hazards to human body after misuse, and common misuse hazards can damage the mucous membrane of oral cavity and gastrointestinal tract and show corresponding adverse reactions. Desiccant in daily life is mainly used to remove water in products or food packaging. Preventing moisture, preserving the taste of food, prolonging the warranty and other roles. Commonly used desiccants such as: silica gel desiccant and lime desiccant. If it is silica gel desiccant, because of its substance often can not be absorbed by the human gastrointestinal tract, generally will be discharged through the feces, there is no obvious harm to the human body, may cause constipation and other adverse reactions. When lime desiccant is taken by mistake, because of its strong alkali characteristics, it is easy to damage the mucous membrane of oral cavity, esophagus and gastrointestinal tract in the process of entering the human body, thus causing nausea, vomiting, acid reflux, and even ulcers and other hazards. Misuse of desiccant must be vomited as soon as possible, should go to the emergency department of the hospital in a timely manner.