During root canal treatment, if there is inflammation at the root tip, the doctor will usually seal the root canal with sterile medication before filling. The pressure in the tooth inside the root canal rises at the moment of sealing, and some of the medications may be irritating, which can naturally cause pain in the tooth after sealing. If the tooth becomes painful after the sealant is applied, anti-inflammatory and pain-relieving medications can be taken to relieve the symptoms and prevent the pain from persisting. The moment some patients seal the medication clinically, that is, the painful and uncomfortable feeling such as jumping and boredom will start to appear, this feeling usually does not last long, most of them will be slowly relieved in about 1 hour. If the pain is caused by body position or sleeping, a small amount of pain medication can be taken and the symptoms will usually disappear after 24 hours. If the pain persists without relief, you will need to contact your primary care physician to treat the medication sealed in the root canal, depending on the situation.