Why do my teeth feel sore after putting on my aligners?

The moment you place your aligners over your teeth, they begin applying force. This force may cause minor discomfort in your teeth as they begin to move. These sensations generally subside within a few days of regular wear. If you’re experiencing soreness as you adjust to a new aligner step, we recommend changing into new aligner steps before you go to bed so your teeth can start adjusting while you doze. You can also take aspirin or ibuprofen to help with soreness during the day.

Using your Chewies frequently when beginning a new set of aligners can also reduce discomfort by helping settle your aligners more snugly onto your teeth and increasing the blood flow to your periodontal ligaments.