All You Need to Know About Canker Sores on Tonsil

Are you experiencing a canker sore on your tonsil and unsure about its cause and how to deal with it? If so, this guide will address all you need to know about canker sores.

Canker sores are ulcers that form in your mouth’s soft tissues. They can develop under your tongue, inside your cheeks and lips, in the back of the throat, or on the tonsils. These non-contagious but painful sores are red edges with a yellow, white, or grey center. Some people get them often, ranging from a mild sore to a more painful lesion. Canker sores can last anywhere between a couple of days to a few weeks.

Let’s discuss the symptoms of canker sores on the tonsil.

Symptoms of Canker Sores on Tonsil

You can experience severe pain when a canker sore forms on your tonsil. Some people often mistake it for tonsillitis because of a sore throat. Its symptoms start with a burning or tingling sensation in your throat. After being fully formed, these sores might cause a stinging sensation when you drink or eat something acidic.

Causes of Tonsil Canker Sores

While the exact cause of canker sores is still unknown, certain things can trigger or increase the risk of developing them. These are:

  • Emotional stress
  • Food sensitivities
  • Mouth injuries
  • Viral infections
  • Contact with Sodium lauryl sulfate
  • Hormonal fluctuations
  • Nutritional deficiencies, such as zinc, folate, vitamin B-12, or iron deficiency

You can also experience canker sores due to the following medical conditions:

  • Celiac Disease
  • Behcet’s Disease
  • Inflammatory Bowel Disease (IBD)
  • HIV and AIDS

Anyone can experience a canker sore. However, these sores are more common in teens, young adults, and females. Family history can also play a role in their recurrence.

Tonsil Canker Sores Treatment

Most canker sores are healed on their own without any treatment. You can expect them to go away in about a week. But in some severe cases, they can turn into a major issue called aphthous stomatitis. You may be affected by it if these sores last for more than two weeks and appear bigger than typical canker sores. These sores can also cause scarring.

While none of these types require any treatment, you may use over-the-counter products to help relieve pain during the healing process. These products include:

  • Mouth rinses that have hydrogen peroxide or menthol
  • Ibuprofen or other NSAIDs
  • Topical mouth sprays with phenol or benzocaine

For canker sores on tonsils, mouth rinse is probably the easiest option. As you heal, you should try to limit acidic or spicy foods, which may cause irritation.

Home Remedies for Canker Sores

Several home remedies can help you get relief from a canker sore in your throat, such as:

  • Rinsing with salt water or baking soda
  • Applying milk of magnesia by using a cotton swab
  • Gargling with chilled water to relieve inflammation


It’s not uncommon to have canker sores developed on tonsils. You will likely experience throat pain for a couple of days, but the sore should go away on its own within 7 to 14 days. Make an appointment with our general & family dentist in Porter. if you have a large canker sore or it doesn’t get any better within the timeframe. Call us at 281-519-7200 for more information or set up an appointment.