When you have a cold, you should not eat mutton as it is considered a "hot" food, which can aggravate the condition and lead to secondary infections. This type of food is considered an unfavorable stimulus for recovery from a cold. In terms of diet, it is advisable to eat lighter, softer foods rich in vitamins and high in fiber, such as fruits and vegetables. You should consume more celery, spinach, mung bean sprouts, tomatoes, carrots, avocados, dragon fruit, mangoes, and kiwis. Also, drink plenty of water, avoid staying up late, and avoid excessive stress.