Stomach acid is very important for digestion but it should not become very high, says a food expert. Avoiding spicy food is the best way to keep it under control. According to Geeta Sidhu-Robb, raw food pioneer and creator of the Nosh Detox - a diet that helps in removing toxins from the body, one should avoid spicy food that causes such a problem. She also shares other tips to reduce stomach acid, reports femalefirst.co.uk.- Eat smaller and lighter meals regularly. - Avoid eating late in the night, also sleep with your head in a raised position. - Avoid peppermint tea. - Losing weight provides a long term solution to stomach acid. - Medications like aspirin and Ibuprofen make it worse. - Avoid smoking as this makes the occurrence of acid reflux more likely.