Acidity occurs when acid from your stomach flows into your esophagus. Because of this, the lining of the esophagus starts to become inflamed and irritated. When this happens, you may feel a burning sensation in your chest or throat. It is also called heartburn. Acidity, acid reflux, also called acid indigestion, is often a result of external factors such as unhealthy eating, low physical activity, weight gain and smoking etc. There are many home remedies that can help in treating acidity, As such, many people have claimed that lemon water can be beneficial in reducing acidity.