1. Acid indigestion.

Gastroesophageal reflux disease occurs when food and liquids in your stomach move back up into the tube that joins your throat and esophagus (GERD). You may experience a burning sensation in your chest as a result. One study from 2000 found that foods like onions can worsen heartburn.

2. Bloating

Bloating can be excruciatingly uncomfortable when the stomach is overwhelmed with gas. Onion eating causes severe bloating daily. The fibers in onions create bloating.

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