When teeth move, it is likely that you will experience some form of discomfort. Invisalign applies pressure on the teeth in order to move them so you may feel some degree of discomfort. The good news is that this is only temporary. You would likely only experience the discomfort on the first day or two after your have received a new aligner. Once you have become accustomed to your new aligner, the discomfort will settle and may subside altogether.