Acute gastroenteritis, due to inflammation of the gastrointestinal tract, can cause gastric colic. Clinically, it may manifest as upper abdominal pain, nausea, vomiting, and diarrhea. It often occurs in the summer and is directly related to improper diet. It can cause not only stomach pain but also electrolyte imbalance, intestinal perforation, and sepsis. Active use of medications should be undertaken for treatment, with attention to prevent dehydration. During the treatment period, eat a light diet, avoid spicy food, rest well, and keep the abdominal area warm.