If you have a cough or cold, you can drink honey water in moderation, but don’t drink too much, because honey water is too sweet. If you eat too sweet food or drink too sweet water when you have a cough, it may produce phlegm, causing the cough to linger or even worsen. If you have a cough or cold, you should generally pay attention to eating foods that are well digested and nutritious, such as lean vegetable porridge, tomato and egg noodles, vegetable noodles, egg custard, etc. You can eat some vegetables and fruits rich in vitamin C, such as apples, bananas, oranges, dragon fruit, etc., and some green vegetables, such as spinach, lettuce leaves, bok choy and baby greens, in moderation. Avoid eating fried, greasy, spicy and stimulating foods, such as fried chicken, fatty meat, spicy hotpot and spicy pot, and also avoid overeating. When you have a cold or cough, you should take rest and drink more water, but the elderly should pay attention to drink water in small amounts and several times, and not too much water at once to avoid causing heart failure.