6 Reasons Why Your Tooth With Root Canal Hurts When Pressure Is Applied

February 28, 2023

After an invasive root canal surgery, the last thing anyone wants — or expects — is for their tooth to start hurting again. But sadly, that scenario is not as uncommon as you think. A root canal tooth may hurt when tapped, or there might be an underlying pulsating pain in your tooth. No matter the cause, if your tooth starts hurting the moment pressure is applied, it might be a cause for concern.

Why Does My Tooth With Root Canal Hurt With Pressure?

Root canals are known to relieve pain and get rid of tooth decay. They’re not supposed to cause pain. However, if you recently had surgery and your tooth with a root canal hurts with pressure, it may be due to the following reasons:

  1. Post-Surgery Inflammation
    Just like any other oral procedure, you might experience slight sensitivity or discomfort after a root canal. This is completely normal and to be expected. So, if your tooth starts hurting, it’s probably due to inflamed gums and tissues.
  2. Root Infection
    Even though a root canal is performed to remove all bacteria from a damaged tooth, sometimes the excavation is not as successful. Thus, the leftover bacteria can then sneak further into the pulp and infect your soft tissues. This way, if you feel a pulsating pain in your mouth after a root canal, it could be due to a root infection.
  3. Improperly Fitted Crown
    Not all root canals are successful. Sometimes the error occurs during the procedure itself. Whereas other times, the issue can lie within a loose-fitted crown. That is to say, if the crown attached is too big for your tooth or not properly bonded, you might feel an intense bout of pain after biting down on your food.
  4. Incomplete Procedure
    Given how root canals clear out the canals in your teeth, an incomplete procedure may result in extreme tenderness. This happens if your dentist misses a canal, leading to root and tissue damage.
  5. Loose Filling
    Similar to an improperly fitted crown, a loose filling can also lead to excruciating tooth pain. Whether you apply pressure to it or not, a tooth with a detached filling is a serious dental issue.
  6. Soft Tissue Damage
    There are many attributes that lead to soft tissue damage. For instance, bacteria finding its way to the tissue or a dental filling seeping into your gums, past the root tip. Regardless of the cause, however, the pain tends to go away once the tissue recovers.


To sum it up, if your tooth with a root canal starts to hurt, especially when pressure is applied to it, you may have to visit your dentist. A failed root canal is not something to take lightly, as it could lead to significant dental health issues.

To prevent serious damage, contact AK Dental of South Austin today to determine the best course of action. You can reach out to us by phone at (512) 653-3008 or by visiting drop our clinic at 7010 State Hwy 71, Austin, TX 78735, United States.


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