While Invisalign is usually more comfortable than traditional braces, there is still some discomfort associated with all orthodontic treatments. Since we will be shifting your teeth, you may notice tenderness and soreness as you get used to each new set of trays. Invisalign works by applying gentle pressure to your teeth which in turn creates inflammation that signals your tooth roots to shift. If you would like to lessen your discomfort during the initial adjustment period, we recommend that you take Tylenol. It is important to avoid ibuprofen because it is an anti-inflammatory and actually hinders the tooth movement process.