Four-year-old boys usually need to eat after 6-24 hours after tonsillectomy, but it is recommended to consume liquid food. Tonsils are the body’s immune organs, the process of eating and swallowing after tonsillectomy may cause more obvious swallowing pain due to the pull of the incision. It is generally recommended that after 6-24 hours, you can properly eat some liquid food, such as millet porridge, rotten noodles and so on. However, the liquid food should not be too hot to prevent vasodilatation due to heat, resulting in bleeding of the wound. The liquid diet is usually maintained for at least 2-3 weeks, and if the wound grows stronger, normal diet can be resumed. During the recovery period, it is recommended to give your child a light and easily digestible diet, avoiding spicy and irritating foods. If a four-year-old boy becomes unwell after tonsillectomy, it is recommended to go to the hospital immediately.