Can Drinking Too Much Water Cause Stomach Pain?
Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 21st, 2026.
Yes, drinking too much water can cause stomach pain and discomfort. When you consume large amounts of water quickly, it can distend your stomach beyond its comfortable capacity of about 1-1.5 liters. This rapid expansion stretches the stomach walls, triggering pain receptors and creating cramping sensations. Drinking more than 1 liter per hour can overwhelm your kidneys' processing capacity of 800-1000ml hourly, leading to water retention and additional abdominal pressure. The pain typically occurs in the upper abdomen and may be accompanied by nausea, bloating, or a feeling of fullness. To prevent this, sip water gradually throughout the day rather than consuming large volumes at once.
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