Gum swelling and pain may be the presence of food impaction, food embedded in the teeth when eating, resulting in inflammation of the gum papilla, there may be swelling and pain. It is recommended that patients use dental floss to clean the gap between the teeth after each meal to remove the food debris inside the gap, and rinse the mouth with water in time after each meal to maintain good oral hygiene. Go to the hospital for ultrasonic cleaning every six months or so and pay attention to oral hygiene. If there are caries in the mouth and other conditions that cause food impaction, the caries should be filled in time for treatment. If the food impaction is caused by wisdom tooth obstruction, it is necessary to remove the wisdom tooth in time to avoid other adverse consequences.