The child’s mouth hurts because of the child’s bump. If the child’s lips are injured, it may be caused by the child’s accidental fall during play, or it may be caused by accidentally biting his or her lips while eating, so don’t worry about this situation, it will be fine after a few days of slow scabbing. If it hurts inside the mouth, it may be a mouth ulcer that leads to some small blisters inside the mouth, which will be very painful after breaking, this is caused by bacterial infection, you can give your child some mouth ulcer dispersion and other drugs for treatment. No matter what the situation is, parents should not give their children spicy, stimulating food and hot food, which will lead to more fire and aggravate the pain, and do not let children eat more acidic food, because children will feel especially stinging after eating. Let your child gargle more, pay attention to oral hygiene, and eat more fruits and vegetables to replenish the vitamins in the body, which is conducive to wound healing.