Lemon is rich in vitamins, so you can eat lemon in moderation when you have a cold. When you have a cold, you should pay special attention to your diet and eat well-digested and nutritious food, such as lean vegetable porridge, tomato and egg noodles, vegetable noodles, egg custard and so on. Do not eat spicy and stimulating food, such as spicy hot pot, spicy pot, and do not eat too greasy food, such as fried chicken, fatty meat, etc.. And of course, don’t eat raw and cold food, such as food just taken out of the refrigerator or ice cream, etc. It is also important to emphasize that you should not overeat to avoid damaging the function of the spleen and stomach. Of course, when you have a cold, you should also emphasize rest and drink more water, but for the elderly, you should pay attention to drinking water in small amounts and several times, and not too much water at once to avoid heart failure.