Want to vomit is a symptom of nausea, scaling generally does not cause the symptom, if the scaling process stimulates the root of the tongue or throat area, or the root of the tongue and throat stimulation of sensitive people, may lead to nausea. Scaling is the use of ultrasound to remove plaque on the gums, stains and tartar and other substances, can play a role in cleaning the teeth, scaling may lead to bleeding gums, teeth, soreness and other complications, generally does not cause nausea, but scaling process instruments and other stimulation to the throat may induce nausea. If you are sensitive to throat irritation, it is easy to produce nausea, tell the doctor before scaling, a little attention during the operation, you can generally avoid this situation. You should choose a regular medical institution for scaling, and inform your doctor in advance if you have any symptoms of discomfort or infectious diseases. The use of ultrasonic scaling for some pacemakers will have an impact, if equipped with a pacemaker, before scaling must be fully communicated with the doctor.