Nausea and chills after gastroscopy are not normal, and may be caused by colds, low blood sugar and other reasons. Gastroscopy is an invasive operation, which may cause some stimulation to the esophagus and stomach, and may cause nausea after doing it, but generally does not lead to chills, so nausea and chills after gastroscopy is not normal. So it is not normal to have nausea and chills after gastroscopy. It is possible that you did not pay attention to warmth during the examination, resulting in cold and flu, which caused gastrointestinal reactions, nausea and a rise in body temperature causing chills. During a gastroscopy, the stomach is usually empty. Because you have not eaten for a long time, your body lacks energy, and there is a possibility of hypoglycemia leading to nausea and chills. After gastroscopy nausea and chills, it is recommended to inform the doctor in time to find out the cause and follow the doctor’s instructions for timely treatment.