Signs You May Need A Root Canal
November 18, 2025
As Dr. Dhaval Patel at Simply Teeth in Mount Prospect, I often meet patients who wait too long to address tooth pain or discomfort because they hope it will go away on its own. Unfortunately, what starts as a minor sensitivity can turn into a serious infection requiring root canal therapy to save the tooth. Understanding the warning signs early can make the difference between keeping a natural tooth and needing an extraction. My goal is to help patients recognize these symptoms and understand that modern root canal treatment is comfortable, effective, and often the best way to restore dental health.
Understanding What A Root Canal Treats
A root canal treats infection or inflammation inside a tooth’s pulp, which is the soft tissue that contains nerves, blood vessels, and connective tissue. When decay or trauma reaches this area, bacteria multiply, causing pressure, pain, and infection. Without treatment, the infection can spread to the surrounding bone and gums, leading to an abscess or tooth loss.
Root canal therapy involves removing the infected pulp, cleaning the canal, and sealing it with a durable filling material. Once completed, the tooth can function normally again and is usually protected with a dental crown.
Persistent Tooth Pain
One of the most common signs that a root canal may be needed is persistent or throbbing pain. This discomfort may be constant or occur when biting down, chewing, or applying pressure. Pain that wakes someone up at night or radiates to the jaw, ear, or other teeth often indicates a deeper infection inside the tooth.
While over-the-counter pain relievers may temporarily help, recurring or severe tooth pain should always be evaluated by a dentist like Dr. Patel. Quick diagnosis can stop the infection before it worsens.
Sensitivity To Hot Or Cold
Increased sensitivity to temperature changes is another sign that a root canal might be necessary. If a tooth hurts for several minutes after drinking hot coffee or eating ice cream, the pulp may be inflamed or infected.
Short bursts of sensitivity are common after minor enamel wear or whitening, but lingering pain is not normal. The longer the nerve remains exposed to bacteria or damage, the more difficult it becomes to save the tooth.
Swelling And Tenderness
Swelling around a specific tooth or in the gums may signal an abscess. This occurs when infection spreads from the root tip into the surrounding tissue. The area may appear red, tender, or even develop a small pimple-like bump known as a fistula. Pus drainage or a foul taste in the mouth can also occur.
If swelling spreads to the jaw, face, or neck, it can become a serious health issue requiring immediate attention. Root canal treatment can stop the infection at its source and prevent it from spreading further.
Darkening Or Discoloration Of A Tooth
A tooth that suddenly darkens or becomes gray may have a dying nerve. Trauma, decay, or infection can cut off blood flow to the pulp, causing internal tissue death. While whitening treatments can improve surface stains, internal discoloration requires dental treatment.
In these cases, a root canal can remove the damaged pulp and preserve the outer structure of the tooth. Afterward, a custom crown restores the natural color and function.
Cracked Or Damaged Teeth
Cracks or chips that expose the inner layers of a tooth can quickly lead to infection. Even small fractures that aren’t visible to the eye can allow bacteria to reach the pulp. Patients who grind their teeth, have old fillings, or experience dental trauma should watch for increased pain, sensitivity, or pressure.
When caught early, root canal treatment can prevent the need for extraction and protect surrounding teeth from shifting.
Avoiding Treatment Can Lead To Complications
Ignoring the signs of infection can cause the condition to worsen. Untreated tooth infections may spread to the jawbone or bloodstream, potentially leading to serious medical complications. Early intervention allows for faster healing, less pain, and better long-term outcomes.
Modern root canal therapy is efficient, often completed in one or two visits, and typically no more uncomfortable than a filling. Advanced technology and local anesthesia allow patients to remain relaxed and pain-free during treatment.
Frequently Asked Questions About Root Canals
Is Root Canal Treatment Painful?
Root canals have a reputation for being painful, but modern techniques and anesthesia make the procedure very comfortable. Most patients report feeling relief afterward because the infection causing the pain is removed.
How Long Does A Root Canal Take?
Most root canals take one to two appointments. The first visit involves cleaning and disinfecting the canals, while the second seals and restores the tooth. The total time depends on the number of roots and the severity of the infection.
Can A Tooth Be Saved Without A Root Canal?
If the pulp is infected or dead, it cannot heal on its own. Antibiotics may control symptoms temporarily, but only a root canal or extraction can remove the infection permanently.
What Happens If A Root Canal Is Delayed?
Delaying treatment allows bacteria to spread, leading to bone loss, abscesses, and increased pain. In some cases, the tooth may no longer be salvageable, requiring an implant or bridge instead.
How Long Does A Tooth Last After A Root Canal?
With proper care and a protective crown, a treated tooth can last a lifetime. Good oral hygiene, routine cleanings, and avoiding excessive grinding or biting hard objects help ensure longevity.
Is A Crown Always Required After A Root Canal?
In most cases, yes. A crown reinforces the weakened tooth structure, restores appearance, and prevents fractures. However, for small front teeth with minimal damage, a strong filling may be sufficient.
Can Root Canal Infections Come Back?
If a tooth is properly cleaned, sealed, and restored, reinfection is rare. However, if bacteria re-enter the canal due to decay, cracks, or poor oral hygiene, retreatment may be needed.
What Causes The Need For A Root Canal?
Deep decay, repeated dental procedures, cracks, or trauma can expose the pulp to bacteria. Once the pulp becomes inflamed or infected, root canal therapy is usually necessary to save the tooth.
Call Simply Teeth In Mount Prospect For Relief
At Simply Teeth, I believe no one should live with tooth pain or risk losing a natural tooth when modern dentistry offers reliable solutions. Early diagnosis and treatment protect both oral and overall health.
Contact our root canal dentist in Mount Prospect immediately by calling us at 847-870-1111. My office in Mount Prospect proudly serves patients from Prospect Heights and Des Plaines, providing gentle, high-quality dental care for the whole family. When pain strikes, prompt attention can make all the difference.
