The symptoms of stomach pain at night are usually considered to be caused by duodenal ulcers, cholecystitis and pancreatitis, and need to be seen by a gastroenterologist to clarify the cause and treat the symptoms. Common causes and treatments 1, duodenal ulcer: excessive secretion of gastric acid or gastric acid discharge disorder, resulting in damage to the duodenal mucosa triggering ulcers. The gastric acid secreted by the stomach at night is more likely to accumulate in the intestine, while the stimulation of the acidic environment leads to spasm, so the symptoms of stomach pain at night are more serious and can be accompanied by black stool and other symptoms. You can apply drugs such as omeprazole, ranitidine and thioglycollate to inhibit the secretion of gastric acid, protect the gastric mucosa and reduce pain symptoms; 2, cholecystitis: acute calculous cholecystitis often attacks at night, gradually changing from stomach distension to colic, which can cause pain in the back of the shoulder radiologically. The pain will change from upper abdominal discomfort to pain in the stomach and lower back, and the pain will be obvious at night, and the pain will increase when lying in the supine position, and changing the position will relieve the symptoms. If the pain is severe, you can take painkillers to control the pain as prescribed by your doctor. It is recommended to eat a light diet, pay attention to dietary hygiene, do not eat cold, hard, greasy, spicy and stimulating food, and prohibit smoking and alcohol. If the pain symptoms continue to worsen and cannot be relieved, you should seek medical attention promptly and seek symptomatic treatment after clear diagnosis to avoid delaying the condition.