Chills and nausea may be caused by food poisoning, peptic ulcer, or gastrointestinal flu, which can be treated with symptomatic interventions according to medical advice. 1. Food poisoning: will cause chills, nausea clinical manifestations, should promptly seek medical attention, follow the doctor’s instructions for infusion, enema, gastric lavage and other treatments, to avoid further aggravation of the condition. 2. Peptic ulcer: If there is a peptic ulcer, it will be manifested as vomiting and other clinical symptoms, due to the poor body, there will be a cold body, should be timely related checks such as gastroenteroscopy, etc., and can be used Ranitidine, Omeprazole, Domperidone tablets and other drugs treatment. 3. Stomach and intestinal colds: If you have a stomach and intestinal cold, the clinical symptoms will be manifested as chills, nausea, etc., you can use Huo Xiang Zheng Qi Pills. If you have chills, nausea and vomiting, it is recommended to consult a doctor to clarify the cause of the illness and standardize the treatment. The use of medication should be under the guidance of a doctor.