Burning stomach after waking up at noon may be caused by improper diet, reflux esophagitis, gastritis, etc. It can be relieved by adjusting the diet, oral rabeprazole enteric-coated tablets, omeprazole tablets and other methods. 1. Improper diet: Irregular diet, long-term over-feeding and over-starvation will stimulate the gastric sinus, resulting in excessive secretion of gastric acid causing stomach burning after waking up at noon. You should fix the eating time, three times a day, regular diet. 2. Reflux esophagitis: Reflux esophagitis is an inflammatory lesion of the esophagus caused by the reflux of food from the stomach and duodenum into the esophagus, which is mainly manifested as a burning sensation in the upper abdomen. The pressure of the lower esophageal sphincter decreases, causing gastric acid to reflux through the lumen of the stomach into the cardia esophagus. It can be treated with oral medications such as rabeprazole enteric-coated tablets and eplazole enteric-coated tablets. Also avoid lying down to rest after a full meal, which can cause reflux and result in acid reflux and heartburn. Severe cases need to raise the head of the bed when sleeping. 3. Gastritis: Gastritis patients gastric mucosa by certain damage and stimulation, gastric acid secretion increases after coupled with increased pressure in the gastric cavity, thus appearing to get up and burn the stomach. Oral omeprazole tablets can be used to assist in the treatment. Patients with Helicobacter pylori infection need to be sterilized. If you wake up in the middle of the day burning stomach, you should go to the hospital in a timely manner, clear the cause of the disease, active treatment, do not self-medication.