The stomach is uncomfortable, and the body has chills, which can be caused by acute gastroenteritis, gastric ulcer, stomach cramps, stomach cancer and other reasons. 1. Acute gastroenteritis: acute inflammation of gastrointestinal mucosa caused by unclean food and drink, manifested by abdominal pain, diarrhea, vomiting, and loss of body fluids due to diarrhea can lead to chills. 2. Gastric ulcer: When the gastric mucosa (ulcer) is irritated by excessive secretion of gastric acid or food, the patient will not only experience stomach pain and other discomforts, but will also experience chills due to spasms and contractions of the stomach lining. 3. Stomach spasm: Cold, spicy and irritating food, bad mood and other stimuli can cause violent contraction of gastrointestinal smooth muscle, resulting in stomach spasm, which is manifested as paroxysmal spasmodic abdominal pain, diarrhea, vomiting and so on. 4. Stomach cancer: Tumor cells will not only affect the digestive function of stomach, but also stimulate the nerves of stomach, causing stomach pain, chills and other symptoms. There are many other reasons for stomach discomfort and coldness, such as gastrointestinal dysfunction caused by cold. As soon as it is detected, you should consult a doctor for a clear diagnosis and targeted treatment.