The procedure was on patient's upper molar.About 90 seconds into the naoci cycle, the patient raised her hands and said she was feeling pain.The doctor discontinued the gentlewave procedure, rinsed with distilled water.Swelling and bruising was noted very quickly.The doctor sent the patient to the ent in the building.The patient was given an rx for steroids and pain meds.The patient had swelling and bruising for a few weeks but it eventually resolved and she is doing fine.