A root canal procedure treats damaged or decaying teeth. If you’re wondering how to know you need a root canal, let’s look at some of the most basic signs.

How To Know You Need a Root Canal

A root canal is the name of a dental procedure that repairs and saves an infected or badly decayed tooth. It’s necessary when the tooth’s pulp, composed of nerves and vessels, becomes infected or damaged. During treatment, a dentist or oral surgeon will remove the pulp and clean and seal the inside of the tooth. Some people fear that their root canal will be uncomfortable or painful, but the procedure is typically no more painful than having a cavity filled. If you’re experiencing any of the telltale signs of deep tooth decay, you shouldn’t delay treatment. If you’re wondering how to know you need a root canal, let’s look at some common indicators.

Persistent Pain

If you’re experiencing persistent, sharp pain, you’re a possible candidate for a root canal. The pain might bother you all the time or come in repetitive bursts. The pain is likely to originate deep in the bone of your tooth. Alternatively, you might feel it in your face, your jaw, or even your other teeth. Tooth pain can have multiple causes. Some other possibilities include:


  • gum disease
  • a cavity
  • referred pain from a sinus infection or another problem
  • a damaged filling
  • an impacted tooth that may be infected


Regardless of the cause, it’s important to schedule an appointment with your dentist as soon as possible. Early diagnosis and treatment for tooth pain will lead to a more optimistic outcome.

Sensitivity to Heat and Cold

Does your tooth hurt when you’re sipping on a cup of steaming hot coffee? What about when you eat ice cream or drink an ice-cold glass of water? The sensitivity could feel like a dull ache or a sharp, stabbing pain. If this sensitivity lingers for an extended period, you might require a root canal. Some people’s teeth are more sensitive than others. If this is the case, special sensitivity toothpaste could help. But if the pain you’re experiencing is sudden or intense, it can be an indication that the blood vessels and nerves in your tooth are infected or damaged.

Tooth Discoloration

Another way to know you need a root canal is tooth discoloration. An infection of the pulp can lead to a discolored tooth. Trauma to the tooth or the breakdown of internal tissue can damage the roots and give the tooth a grayish-black appearance. This discoloration is easier to see in a front, or anterior, tooth. A tooth might abruptly discolor for any number of reasons—amongst them, decaying or damaged tooth pulp.

Swollen Gums

Swollen gums can be a sign of an issue that requires a root canal. The swelling, like any sensitivity, can be constant or occasional. The swollen area might be tender or painful to the touch. This swelling results from the acidic waste products of dead pulp tissues, leading to swelling outside the root tip area. You might also notice a small pimple forming on your gums. This is called a gum boil, parulis, or abscess. The pimple can ooze pus from the infection, resulting in an unpleasant taste in the mouth and bad breath.


Have you noticed any of the signs of decayed or damaged tooth pulp? Have a knowledgeable, reliable professional examine your tooth. For root canal treatment in Riverview, Florida, come visit Dr. Castellano. You’ll leave with a fixed tooth and a bright, winning smile.

By chris castellano June 3, 2025
The short answer: they don’t have to be. Thanks to modern techniques and local anesthesia, root canal therapy is often no more uncomfortable than getting a filling. But let’s take a closer look at what to expect — and when pain might signal a problem. 🦷 What to Expect During a Root Canal I f you’ve been told you need a root canal, don’t panic. The procedure is done to remove infection from inside the tooth , relieve pain, and save the natural tooth. Most patients feel little to no pain during the procedure , especially when performed by an experienced dentist. We’ve been providing root canals in Riverview, FL since 1999, and patient comfort is always a top priority. 😬 What About After the Root Canal? Post-treatment discomfort is normal and usually follows a predictable pattern: Day 1–2: Mild soreness or sensitivity around the treated tooth Day 3–5: Pain may gradually increase, peaking around days 5–6 Week 2 and beyond: The pain should steadily decrease In some cases, mild discomfort can linger for up to 6–8 weeks — this is still within the range of normal healing. This pain is often due to inflammation in the surrounding tissues, not the tooth itself. As your body clears out the inflammation, the pain should resolve on its own. Medications common prescribed for pain are: Tylenol 3 Ibuprophen 800 ⚠️ When Pain Is a Sign of a Problem While some discomfort is normal, severe or persistent pain may mean something isn’t right . Two common complications include: Short Fill: The root canals weren’t filled all the way to the tip of the root Missed Canals: One or more canals were not treated during the procedure These issues can allow infection to persist and require further treatment. That’s why follow-up care and communication with your dentist are essential.
By chris castellano June 3, 2025
In some tooth extractions, particularly wisdom teeth, a small piece of the root (called a root tip or fragment) may break off. While this can sound alarming, it’s not always dangerous. When is it OK to leave a root tip? Small (2mm) , uninfected tips near sensitive areas (like nerves or sinuses) may be intentionally left in place if removal poses more risk than benefit. When should it be removed? If the root is large, infected, or causing pain or swelling , it should be extracted by a dentist or oral surgeon. Leftover root fragments can lead to infection, pain, or delayed healing if not properly managed.  What to do if you’re unsure: Ask your dentist for post-op X-rays. Seek a second opinion if you have ongoing discomfort or weren't informed about a retained root.
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A root tip should not be left behind if: It is infected or shows signs of decay It causes ongoing pain , swelling, or delayed healing It could interfere with future dental treatments, such as Orthodontics or dental implants
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By chris castellano May 5, 2025
If a tooth is knocked out, it's a dental emergency requiring immediate action. First, try to put the tooth back in its socket, then seek emergency dental care as soon as possible, ideally within an hour. If you can't put it back, keep the tooth moist by placing it in milk or saliva, or a tooth-saving solution. Detailed Steps: Locate the tooth: If possible, find the tooth that was knocked out. Handle the tooth carefully: Pick up the tooth by the crown (the chewing surface), not the root. Rinse gently: If the tooth is dirty, rinse it briefly with water or milk, but avoid scrubbing or removing any tissue attached to the root. Reinsert if possible: If the tooth is still loose, gently try to put it back in its socket, ensuring the root-side is facing the gums. Keep the tooth moist: If you can't put it back in the socket, keep the tooth moist by placing it in milk, your saliva, or a tooth-saving solution. Seek emergency dental care: Go to your dentist or a nearby emergency dental clinic as soon as possible, ideally within an hour of the injury. The tooth will have to ridgedly fixated for several weeks 6-8 or more done with heavy wire bonded over several teeth.
By chris castellano May 5, 2025
A chipped tooth can be caused by stress cracking or just a sharp blow to the tooth. As long as it's minor like in this picture it can be fixed with composite. If it goes into the nerve chamber of the tooth it will require a root canal and crown. Chipped teeth have symptoms of increased temporary sensitivity to air, hot cold fluids, or any that's chewed into the area. It will be a sharp pain that quickly (within a second goes away). The reason for this is dentinal sensitivity. When the outer enamel layer is chipped off into the dentinal layer it exposes the open tubules of dentin that communicate with the nerve directly. Its important to get a chipped tooth repaired quickly because a slightly aggravated nerve in a healthy state can become irreversibly aggravated over time requiring root canal crown due to bacterial contamination of the tubules.
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