When a child bleeds and swells after a fall that breaks the lip, an oral examination is performed and a whole-mouth surface tomogram is taken. If the contusion of the lip mucosa occurs in a superficial location, the wound can be rinsed with plenty of saline and sterilized by applying iodophor. If the wound is deeper and reaches the submucosal muscle layer, the edges can be trimmed and aligned sutures can be performed. Pay attention to strengthen oral hygiene, cleanliness, reduce the retention of food debris, eat less overheated or spicy, irritating food, and apply cold compresses when necessary to reduce wound exudation and relieve swelling. If the tooth is fractured and the pulp is not exposed, the edges can be adjusted and ground and then filled with composite resin to restore the anatomical shape. If the crown is fractured and pulpal tissue is exposed, a one-time root canal is completed under local anesthesia to fabricate a resin pre-formed crown restoration.