After gastroscopy, the symptoms of pain in the left lower abdomen and hot feet are usually related to the stimulation of gastric mucosa by the gastroscope. It is recommended to take proper rest and active observation, or take belladonna tablets and other medicines as prescribed by the doctor to alleviate the symptoms. Gastroscopy requires the gastroscope to be inserted into the stomach, and when the patient swallows the gastroscope, the gastroscope may rub the gastric mucosal tissue, which may sometimes lead to mild congestion of the gastric mucosal tissue, and cause stimulation to the surrounding nerve tissues, which may lead to referred pain, which may be manifested as pain in the left lower abdomen, and fever in the heart of the feet. After gastroscopy, if there is pain in the left lower abdomen and fever in the heart of the feet, you can follow the doctor’s advice to rest in bed, and if necessary, you can also follow the doctor’s advice to take belladonna tablets to relieve the spasm of the smooth muscle of the stomach, which can make the abnormal symptoms gradually reduce. Gastroscopy may cause discomfort after the examination, need to be correctly treated and observed under the guidance of the doctor, and also pay attention to a light diet, usually will gradually return to normal. If the symptoms continue to be unrelieved or worsen, you should consult a doctor.