Top of the page
Canker sores are painful white sores in the mouth. They often begin with a tingling feeling. This is followed by a red spot or bump that turns white. Canker sores appear most often on the tongue, inside the cheeks, and inside the lips. They can be very painful. These sores can make it hard for your child to talk, eat, and drink.
A canker sore may form after an injury or stretching of tissues in the mouth. This can happen, for example, during a dental procedure or teeth cleaning. Your child may get a canker sore if he or she bites the tongue or the inside of the cheek. Other causes are infection, certain foods, and stress. Canker sores don't spread from person to person.
The pain from your child's canker sore should get better in 7 to 10 days. It should heal completely in 1 to 3 weeks. In most cases, a canker sore will go away by itself. Home treatment can ease pain and discomfort. If your child has a large or deep canker sore that does not seem to be getting better after 2 weeks, your doctor may prescribe medicine. Canker sores often come back again.
Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if your child is having problems. It's also a good idea to know your child's test results and keep a list of the medicines your child takes.
Ask your doctor before using mouth-numbing medicine for children of any age. Some of these can be dangerous.
Call your doctor or nurse call line now or seek immediate medical care if:
Watch closely for changes in your child's health, and be sure to contact your doctor or nurse call line if:
Go to https://www.healthwise.net/patientEd
Enter T042 in the search box to learn more about "Canker Sore in Children: Care Instructions".
Current as of: October 27, 2020
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
©2006-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.