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Canker Sores After Tooth Extraction and Wisdom Teeth Removal

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  • Post last modified:October 12, 2023

Canker sores after tooth extraction are a common concern after dental procedures. Understanding their causes, symptoms, and effective management techniques is crucial for a smooth recovery process. This detailed guide will thoroughly explore sores after dental extractions, providing valuable insights and practical tips to cope with this discomfort.

Why Do Canker Sores Develop After Extraction or Wisdom Teeth Removal?

Canker sores are a common complication after extraction or wisdom teeth removal. They are caused by the trauma to the gums during the dental procedure. Canker sores can be more painful and difficult to heal after extraction or wisdom teeth removal than canker sores that develop in other mouth areas because the gums are more sensitive and prone to infection after a dental procedure.

What is a canker sore?

A canker sore is a tiny, circular, or oval-shaped ulcer that develops inside the mouth. The ulcers are non-contagious and typically resolve independently within two weeks. They are different from cold sores, which occur on the outer lip. The precise origin remains uncertain, but they are thought to be triggered by a combination of factors, including stress, trauma to the gums, and food allergies.

Three primary categories of canker sores exist:


They are the most common type, small and shallow, and usually heal within two weeks.


It is more extensive and more profound than the minor form. The healing process can span several weeks, sometimes leaving a lasting scar.


The least common type occurs in clusters and can be excruciating.

symptoms of canker sores

The most common symptoms of canker sores are:

  • Painful, round, or oval ulcers on the inside of the mouth
  • Redness and inflammation around the ulcers
  • Difficulty eating and drinking
  • Fever

causes of canker sores

The causes remain unknown; however, studies suggest they are thought to be triggered by a combination of factors, including:

  • Stress
  • Trauma to the gums
  • Food allergies
  • Hormonal changes
  • Vitamin B12 or iron deficiency
  • Certain medications
  • Specific medical conditions, including Crohn’s disease and ulcerative colitis, and HIV/AIDS
  • Triggers of Canker Sores
  • Burn during the drilling of the tooth.
  • Toothpaste ingredients (sodium lauryl sulfate)

How to Treat a Canker Sore After Extraction or Wisdom Teeth Removal

The best way to treat a canker sore after extraction or wisdom teeth removal:

  • Follow your dentist’s postoperative instructions carefully. Taking this action will reduce the chances of getting infected and promote healing.
  • You can also use home remedies and over-the-counter medications to relieve pain and discomfort.
  • Additionally, there are prescribed medications available for treating severe canker sores.

Home Remedies for Canker Sores

Several home remedies can help relieve the pain and discomfort,including:

  • Gargling your mouth several times a day with warm salt water
  • Apply a cold compress to the affected area.
  • Using a mouthwash that is designed explicitly for these ulcers
  • Avoiding foods and drinks that causes irritation.

Over-the-Counter Medications for Canker Sores

Some over-the-counter medications can help relieve the pain and discomfort including:

  • Pain relievers, such as ibuprofen or acetaminophen
  • Topical gels and ointments that contain benzocaine or lidocaine
  • Mouthwashes that contain benzydamine hydrochloride
  • Prescription Medications for Canker Sores

If your ulcer does not heal and persists after two weeks, your dentist may prescribe a medication, such as a corticosteroid or an antibiotic.

Dental Treatment for Canker Sores

In some cases, your dentist may recommend a dental treatment to help heal a canker sore, such as:

  • A protective coating applied to the ulcer can help reduce pain and promote healing.
  • Applying a corticosteroid ointment to the sores can help reduce inflammation and pain.
  • Removing the sores: This is usually done if the canker sore is severe or does not heal after other treatments have been tried.
  • Laser therapy is painless and non-invasive. A procedure that employs a concentrated beam of light to treat various conditions. Cauterization is a procedure that uses a heat source or a chemical to burn the canker sore. Surgery is a more invasive procedure typically used only for very large or severe sores.

How to Prevent Canker Sores After Extraction or Wisdom Teeth Removal

There are some things you can do to help prevent sores after extraction or wisdom teeth removal, including:

  • Follow your dentist’s postoperative instructions carefully.

Maintain good oral hygiene. To maintain good oral health and avoid dental problems, brushing your teeth twice daily is recommended.

  • Avoid foods and drinks that irritate your gums, such as nuts, chocolate, citrus fruits, and spicy foods.
  • Manage stress.
  • Get enough sleep.
  • Eat a healthy diet.


Ulcers or sores after extraction or wisdom tooth removal are common complications. Effective treatments and preventive measures can alleviate pain and discomfort and minimize the risk of related complications and the development of these sores. If you have an ulcer after extraction or wisdom teeth removal, follow your dentist’s instructions and contact them if you have any questions or concerns.