Although about 95% of root canals cause very little discomfort after the treatment is completed, there are about 5% of cases which can cause significant pain. These are commonly referred to as “Flare-ups”. They mostly occur on badly affected teeth, teeth that are extremely irritated or sensitive, or teeth that have a history of prior treatment. Sometimes, however, they occur randomly, even on patients that have had several root canals done previously without any problems. If you have a flare-up you may experience moderate to severe pain, swelling, bruising, throbbing and general discomfort, which usually begins within 24 hours after treatment and may last 2-4 days. Please contact our office if you experience any of these symptoms and we possibly do everything to get you some relief. You may be prescribed antibiotics, stronger pain medication, or you may be asked to come to the office to receive further therapy should you experience any of these symptoms call our office at 718-323-0633.