Canker sores are small, painful ulcers inside the mouth that can make eating, drinking, and brushing uncomfortable for children. Most heal on their own within one to two weeks and are not contagious. However, sores that last longer than two weeks, keep coming back, are unusually large, or keep your child from eating or drinking should be checked by a professional. At Seahorse Kids Dental, our pediatric dentist team in Harbor City, CA helps San Pedro, CA families find relief and rule out other concerns.
What Does a Canker Sore Look Like?
A canker sore is usually round or oval with a white, gray, or yellow center and a red border. They typically appear on soft tissue inside the mouth, such as:
- The inside of the cheeks or lips
- The tongue
- The gums or the floor of the mouth
Children may feel tingling or burning a day before the sore appears.
Is It a Canker Sore or a Cold Sore?
These two are often confused, but they are different. Canker sores form inside the mouth and are not contagious. Cold sores, also called fever blisters, usually appear on or around the outside of the lips and are caused by a contagious virus. Knowing the difference helps you choose the right care and decide whether your child needs to avoid sharing cups or utensils.
What Causes Canker Sores in Kids?
The exact cause is not always clear, but common triggers include:
- Accidentally biting the cheek, lip, or tongue
- Brushing too hard or using a toothbrush with stiff bristles
- Rubbing from braces, appliances, or a sharp edge on a tooth
- Acidic or spicy foods like citrus, tomatoes, and hot chips
- Stress, fatigue, or recent illness
- Low levels of certain nutrients, such as iron, vitamin B12, or folate
- A family history of frequent canker sores
How Can I Help My Child Feel Better at Home?
While the sore heals, these steps can ease discomfort:
- Offer soft, bland, and cool foods like yogurt, smoothies, and oatmeal
- Avoid salty, crunchy, spicy, and acidic foods until the sore heals
- Use a soft-bristled toothbrush and brush gently around the area
- For children old enough to spit, a gentle rinse of warm water with a little salt can soothe the area
- Ask your pediatrician or dentist before using any over-the-counter numbing gel, since some products are not recommended for young children
Pain relievers made for children may help when used as directed by your pediatrician.
When Should My Child See a Dentist for Kids?
Schedule a visit if your child has:
- A sore that has not healed after two weeks
- Sores that are very large or appear in clusters
- Canker sores that return frequently
- Trouble eating or drinking enough fluids
- A sore caused by a broken tooth, sharp filling, or dental appliance
If sores come with a high fever, a rash on the hands or feet, or your child seems very unwell, contact your pediatrician, since these can be signs of a viral illness. For sudden mouth pain or injury, our emergency dentistry team is here to help.
How Can a Dentist Help with Canker Sores?
A dentist for kids can examine the sore, look for irritation from teeth or appliances, and recommend safe treatment options to speed healing. If sores keep returning, your dentist may suggest talking with your pediatrician about possible nutritional or health factors. Regular pediatric dental cleanings and checkups also help spot tissue changes early as part of complete pediatric dentistry care.
Get Relief from a Dentist for Kids Near San Pedro, CA
Canker sores are common, but your child does not have to struggle through them alone. Families in San Pedro, CA can rely on Seahorse Kids Dental in Harbor City, CA for gentle exams and helpful guidance. We accept Medi-Cal and PPO insurance and offer same-day appointments. Call (310) 596-1111 today if your child has a sore that will not heal or keeps coming back.