Does filling a tooth hurt? It depends on the degree of caries of your tooth. If you have no pulp symptoms, you can directly fill it without pain. There is some swelling and pain when the anesthetic is injected, but… it depends on the degree of caries of your teeth. If there are no symptoms of pulp, you can directly fill it without pain. If you have symptoms of pulpitis, it will be filled after root canal therapy After the anesthesia treatment, there is no great pain, but there is some swelling and pain during the injection of the anesthesia, which can be tolerated