Often it is said that a food which is too spicy, will make your gut upset! However, you should be having more of such foods during cold & cough, as they can ease congestion and clear out the sinuses. When the body is warm, it loosens the mucus that helps you breathe better than before. Foods like wasabi, hot sauce, horseradish, and even chilli pepper might bring water to your eyes, but will help you a lot during cold.