Acidity occurs when there is excess secretion of acids in the gastric glands of the stomach, producing gas, bad breath, stomach ache and other symptoms. According to Delhi-based Nutritionist Anshul Jaibharat, "Acidity can be caused due to a long gap between meals, empty stomach or excessive intake of tea, coffee, smoking or alcohol”. When the secretion of acids is more than usual - we experience heartburn or acid reflux or GERD (gastroesophageal reflux disease), which is normally triggered when we eat a heavy meal or spicy foods.