A number of foods can cause stomach acid to leak back up into your oesophagus, causing that unpleasant burning sensation. Alcohol can do it, as can simply overeating. If you go to bed full of food and lie down flat, that stomach acid can leak up, so avoid eating within three hours of bedtime. Acidic white wine, high-fat food which stays in the stomach longer and smoking can all make it worse too. An antacid will soothe it by neutralising the acid but, better still, if you’re prone to indigestion take your time and be mindful of what you’re eating.