a child's mouth with canker sores

Treatment for Canker Sore on Kids

Posted: March 30, 2025

a child's mouth with canker sores

Has your child ever winced in pain while eating, complaining of a burning sensation in their mouth? This might be a sign of canker sores, those painful mouth ulcers. While usually harmless, canker sores can make eating and drinking difficult for kids.

This My Teeth and Me article will guide you through canker sore treatment for children, covering their causes, symptoms, and effective home remedies.

We'll also discuss when to see a doctor and how to prevent these pesky sores.

Understanding Canker Sores in Children

What are Canker Sores?

Canker sores, also known as aphthous ulcers, are small, shallow sores that typically develop on the inside of the cheeks, lips, tongue, or the base of the gums.

Unlike cold sores, which are caused by the herpes simplex virus and appear on the outside of the lips, canker sores are not contagious.

Appearance and Location

Canker sores usually appear as round or oval-shaped sores with a white or yellowish base surrounded by a red border. They can vary in size from tiny specks to larger, more painful ulcers.

Causes of Canker Sores in Kids

The exact cause of canker sores in children isn't always clear, but several factors can contribute to their development:

  • Trauma: Accidental biting of the inner cheek, tongue, or lip, or even vigorous brushing can injure the delicate oral tissues and trigger canker sore formation.
  • Food Allergies: Certain foods, such as acidic fruits (citrus), spicy foods, nuts, and even chocolate, can irritate the mouth and trigger canker sore outbreaks in some children.
  • Nutritional Deficiencies:
    • Iron Deficiency: Low iron levels can increase the risk of canker sore development.
    • Vitamin B12 Deficiency: This vitamin plays a crucial role in maintaining healthy oral tissues.
    • Folic Acid Deficiency: A deficiency in this B vitamin can also contribute to canker sore formation.
  • Stress and Anxiety: Emotional stress can weaken the immune system, making children more susceptible to canker sores.
  • Hormonal Changes: Hormonal fluctuations, particularly during puberty, can sometimes trigger canker sore outbreaks.
  • Certain Medications:
    • Aspirin: In some cases, aspirin can irritate the mouth and increase the risk of canker sores.
    • Non-Steroidal Anti-inflammatory Drugs (NSAIDs): These medications, such as ibuprofen, can also have side effects that may include canker sores.
  • Viral Infections: While not the primary cause, certain viral infections can sometimes weaken the immune system and make children more prone to developing canker sores.
    • Herpes Simplex Virus (HSV): Although HSV typically causes cold sores, in rare cases, it can also contribute to canker sore development.

Symptoms of Canker Sores in Children

  • Pain: Canker sores can be quite painful, especially when eating, drinking, or brushing teeth.
  • Difficulty Eating and Drinking: The discomfort caused by canker sores can make it difficult for children to eat and drink comfortably.
  • Sore Throat: In some cases, canker sores located near the back of the throat can cause sore throat symptoms.
  • Bad Breath (in some cases): If the canker sore becomes infected, it may cause bad breath.

Home Remedies for Canker Sore Relief

Salt Water Rinses

Dissolve 1/2 teaspoon of salt in a glass of warm water. Have your child gently swish the solution around in their mouth for 30 seconds, then spit it out. Repeat several times a day.

Honey Application

Honey possesses natural antibacterial and anti-inflammatory properties that can help soothe canker sores and promote healing. Apply a small amount of honey directly to the sore using a clean cotton swab.

Aloe Vera Gel

Aloe vera gel has soothing and healing properties that can help reduce pain and inflammation associated with canker sores. Apply a small amount of aloe vera gel directly to the sore using a clean cotton swab.

Milk of Magnesia

Milk of Magnesia can help neutralize the acid in the mouth, which can sometimes irritate canker sores. Apply a small amount of milk of magnesia directly to the sore using a clean cotton swab.

Topical Anesthetics

Over-the-counter topical anesthetics, such as Orajel or Anbesol, can temporarily numb the area and provide relief from pain.

  • Precautions: These products should be used with caution in young children and always as directed by the product label.

Over-the-Counter Medications

Pain Relievers (Acetaminophen or Ibuprofen)

Over-the-counter pain relievers, such as acetaminophen or ibuprofen, can help reduce pain and discomfort associated with canker sores.

  • Age-appropriate Dosage: Always administer medications according to the recommended dosage for your child's age and weight.
  • Consult a Doctor for Children under 6: Consult your child's pediatrician before administering any over-the-counter medications to children under 6 years of age.

Topical Anesthetic Gels or Lozenges:

These products can numb the area and provide temporary relief from pain.

May Cause Temporary Numbing of the Tongue

Be aware that these products can cause temporary numbing of the tongue, which may interfere with swallowing or speech.

When to See a Doctor

If your child’s canker sores aren’t improving or are particularly bothersome, it might be time to consult a healthcare provider.

Frequent or Severe Canker Sores

If your child frequently gets canker sores, it’s important to consult a pediatrician to determine if there’s an underlying health condition.

Canker Sores That Don't Heal Quickly (more than 2 weeks)

Canker sores typically heal within 1-2 weeks, so if they persist beyond that, a doctor’s evaluation is necessary.

Canker Sores Accompanied by Fever, Swollen Glands, or Other Concerning Symptoms

These symptoms could indicate a more serious condition that requires immediate attention.

Sores that are unusually large, appear in clusters, or are bleeding should be evaluated by a doctor.

Suspected Underlying Medical Conditions

If your child’s canker sores seem to be connected to other health issues, such as a weakened immune system or nutritional deficiencies, it’s essential to seek medical guidance.

Teething, Teething Fever, and Teething Rashes

In addition to canker sores, young children often experience teething, which can cause discomfort similar to mouth ulcers.

Signs and Symptoms of Teething

Drooling

Excessive drooling is a common sign that your baby may be teething.

Fussiness and Irritability

Children may be cranky or have trouble sleeping while teething.

Chewing on Objects

Babies and toddlers tend to chew on toys, fingers, or other objects to relieve teething discomfort.

Difficulty Sleeping

The pain and discomfort of teething can disrupt a child’s sleep schedule.

Mild Fever

A mild fever is not uncommon when teething, but if it exceeds 100.4°F (38°C), consult a doctor.

Tender or Swollen Gums

Swollen gums are another clear sign of teething.

Teething Fever

Low-grade Fever (usually below 100.4°F or 38°C)

If your child has a low-grade fever, you may worry that it’s related to teething, but a doctor should be consulted if the fever is high or persistent.

When to Consult a Doctor

If your child experiences a high fever, it may be a sign of infection, and you should seek medical advice.

Teething Rashes (Drool Rash)

Teething can cause drooling, which may lead to skin rashes on the chin or neck.

Symptoms and Treatment

Apply gentle creams or ointments to soothe the skin and reduce irritation.

Teething Remedies

Cooling Toys

Teething rings or toys can help numb the gums and provide relief.

Gentle Massage

Massaging your child’s gums with a clean finger can alleviate discomfort.

My Teeth and Me: Your Child’s Dental Health Partner

Located in the heart of New York, NY, My Teeth and Me is the best dental office for pediatric care. Dr. Liora Benichou’s office focuses on creating a warm, patient-centered environment where children receive the highest quality of care.

With a comprehensive range of services such as cleanings, fillings, orthodontics, and fluoride treatments, My Teeth and Me ensures your child’s smile stays bright and healthy.

Contact and book us today.

Conclusion

 graphic image of a child with a canker sore on the tongue

Canker sores are a common occurrence in children, but with the right treatment, they can be managed effectively. By understanding the causes, recognizing symptoms early, and using appropriate remedies, parents can help ease their child’s discomfort.

Remember, if canker sores persist or worsen, it’s always best to consult a healthcare provider at My Teeth and Me for further advice.

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