Root canal treatment for children’s teeth does not cause any serious harm. However, a few children will experience complications such as tooth pain, fractured teeth or accidental swallowing after treatment. 1. Tooth pain: children’s teeth during root canal treatment, the root canal will be cleaned of pulp tissue and other inflammatory substances; treatment will be a stress reaction of tooth pain, the general symptoms are mild without special treatment, if the pain is obvious, it is recommended to consult a doctor in time for follow-up. 2. Tooth fracture: after root canal treatment, the tooth tissue loses the nutrients from the pulp tissue, which will lead to an increase in the brittleness of the tooth tissue; in the case of large chewing force, there will be a fracture, it is recommended that you should not chew hard food during the treatment process, and you can make a metal crown after root canal treatment in order to prevent the tooth from fracture. 3. Mis-swallowing: children’s compliance during root canal treatment is relatively poor, there will be a risk of accidentally swallowing cotton balls or treatment instruments during treatment, it is recommended that a rubber barrier be placed in the root canal treatment process to prevent mis-swallowing. Children’s dental treatment should go to the regular medical institutions.