The way the Invisalign system operates is to exert gradual, gentle pressure on the teeth to shift them into their new, correct position over the course of the treatment. This prolonged pressure can potentially impact on the comfort you may naturally feel in your jaw, your skull and the joints which connect them which could then lead onto discomfort in your shoulder area. You may also be experiencing teeth clenching as you adjust to the daily use of your new tooth aligner appliance. Should you experience significant discomfort during your Invisalign treatment process, please consult our orthodontics team at our dental practice for advice.