Why can drinking water cause heartburn?

Water is not usually the cause of acid irritation. A large drink, rapid swallowing, fizzy water, or lying down soon afterwards may increase pressure in the stomach. That pressure can allow stomach contents to move upwards. The burning may be felt behind the breastbone, with a sour taste, throat irritation, or repeated belching. Recurrent symptoms can occur with [Acid Reflux](/conditions/acid-reflux/); upper-stomach irritation such as [Gastritis](/conditions/gastritis/) can feel similar. A [Hiatus Hernia](/conditions/hiatus-hernia/) may make reflux easier, but a water-related episode does not identify its cause.

Take smaller sips spread through the day rather than swallowing a large amount at once. Notice whether cold, fizzy, or flavoured drinks are more troublesome, and keep a brief symptom diary with timing, meals, posture, and medicines. Stay upright after eating and drinking, and avoid bending or exercising immediately after a large drink. If episodes keep returning, a clinician can assess reflux and discuss [Acid Reflux Medication](/treatments/medical-management/acid-reflux-medication/). Do not stop prescribed medicine without advice.

Arrange medical advice if heartburn is frequent, is worsening, interrupts sleep, or comes with trouble swallowing, persistent vomiting, unexplained weight loss, or black stools. Seek urgent help for chest pressure, severe breathlessness, fainting, sweating, or pain spreading to the arm, jaw, or back, because heart symptoms can resemble reflux.

Ask whether your symptoms fit reflux, whether any medicine or drink is contributing, and whether testing is needed. Mention how soon the burning begins after water, whether it happens with meals, and whether you have a sour taste or swallowing difficulty.