What causes pain on both sides of the upper abdomen?

Pain on the left and right sides of the upper abdomen may be caused by cold, dyspepsia, gastritis, gastric ulcer, etc. Patients with pericardial effusion or pleural effusion will also cause the same symptoms. It is recommended to take a chest X-ray or do a gastroscopy. If it is caused by gastritis, it needs to be treated with drugs to protect the gastric mucosa under the guidance of a doctor.