4 year old toddler teeth bump activity when mild activity can choose not to do treatment, if heavy activity can choose endodontic treatment. 1. Minor activity: If it is only minor activity and there is no other discomfort, you can choose not to do treatment, as long as you don’t let the damaged tooth bite something, it will recover after a while. 2. Severe activity: If the tooth moves a lot, it may hurt the pulp, which will be sensitive to hot and cold stimuli or even painful when it is exposed, then endodontic treatment should be carried out first, and then the crown of the damaged area should be made with a prefabricated crown, and don’t try to eat hard things afterwards. For activities caused by impact injuries, it is recommended that you should first go to the hospital for an examination to make a confirmed diagnosis of the basic condition of the tooth, and then carry out the corresponding treatment.