It is normal to experience some pain from the root canal procedure for the first 24 hours. Usually it is a mild pain easily remedied by an over the counter anti-inflammatory or analgesic for example Advil or Tylenol.
Everyone and every tooth is different and their ability to heal is different. Some people have a badly infected tooth and it may take up to 7 to 10 days for the tooth to settle down. Depending on the individual situation medication may be prescribed before or after the root canal procedure to help manage the pain.
Once completed most root canal treated teeth should be crowned to avoid tooth fracture.