If it is gum swelling and pain caused by periapical periodontitis, don't eat anything too hard when eating, you can eat something with low sugar content to avoid other dental caries; If it is caused by other reasons, it is also called excessive internal heat. In order to reduce excessive internal heat, you can eat watermelon, pumpkin, celery and radish. And drink some chrysanthemum tea and honeysuckle tea, all of which have a certain relieving effect and can play a role in clearing away heat and detoxifying. In addition, try to eat liquid diet, such as noodles, porridge, milk and so on. If you eat eggs, you'd better make them into custard and so on. This kind of food is easier to enter and digest. Also, eat some nutritious food to enhance the body's resistance, so that patients will recover better.