Dental barotrauma is what happens when air pressure changes hurt your teeth. Imagine you have a balloon inside your mouth. When you go up high in an airplane, the air pressure around you gets lower, so the balloon will get bigger too. Similarly, when you go deep down in water while swimming, the pressure on your teeth increases because of the water pushing down on them. Both of these situations can hurt your teeth because of the changes they cause in air pressure.
So, your teeth can feel like they're hurting or even wobbling around. Dentists are the people who know how to fix your teeth when they're hurting or damaged like this. So, the best thing to do is to talk to a dentist if you're feeling pain or discomfort during activities like flying or swimming deep in water. They can help you take care of your teeth and avoid dental barotrauma.