The reason it can be painful is that your teeth are moving into a new position for the first time. Your mouth isn't accustomed to this new shift, and it can be uncomfortable. Whenever you insert a new aligner, you are shifting your teeth just a little bit more into a new position.

Is it normal for your teeth to hurt with aligners?

Since patients wear a new Invisalign aligner every two weeks, you can expect some degree of temporary discomfort occurring every two weeks. You'll find your teeth get accustomed to the new aligners eventually, and the soreness subsides.

How do you make teeth stop hurting from aligners?