In Chinese medicine, dry cough is mostly caused by dry heat or deficiency of lung yin. You should not eat spicy, stimulating or barbecue foods, especially those that have an irritating taste to the throat. When you have a dry cough, you should not eat foods that can cause allergies, such as seafood, mangoes, durian and other foods. Because dry cough in Western medicine, if it is a paroxysmal irritating dry cough caused by a tickling throat, it may be caused by cough variant asthma, allergic pharyngitis, etc. Most of these patients have allergies, so avoid allergy-prone foods in their diet.