Acidity is a general term for excess stomach acid, while acid reflux and GERD are specific conditions caused by that acid moving into the food pipe. GERD (Gastroesophageal Reflux Disease) is a chronic, more severe form of reflux.

Key Differences

• Acidity: Temporary or mild excess stomach acid.
• Acid reflux: Acid backs up into the esophagus occasionally.
• GERD: Persistent acid reflux causing inflammation and complications.