Toothache in young children may cause lip swelling. Young children appear caries, failed to early detection for treatment, due to the spread of inflammation will form apical periapical inflammation, young children’s maxillary bone is relatively blood rich, bone density is low, inflammation will rapidly spread around the apical region, lip swelling. Young children with toothache lip swelling, you need to go to the stomatology department in time for root canal treatment, do a good job for young children, try to cooperate with the doctor, first of all, open the tooth to drain the pulp, and when the swelling of the upper lip to recover, to complete the root canal treatment of the tooth . If the lip is swollen, accompanied by apical pus, can be localized for pus drainage. Young children with toothache and swollen lips must seek timely medical attention and standardized treatment after examination by a doctor to avoid delaying the condition .