What should we do if my 3 yr old son fell earlier today and his tooth is loose?

See your dentist: Ice as a temporary measure and schedule an appointment immediately with your dentist or pedodontist (children dentist), .

Have it checked: There are many possibilities. The tooth may be only slightly loose and will tighten back up on its own. Other possibilities include significant displacement or breakage. Each possibility has a different form of treatment. The best course of action is to have a dentist examine the tooth then treat and advise according to conditions present.