If you’ve ever felt a painful sting while eating or noticed a small, white bump on your gums, you’ve likely wondered: What is a sore in your mouth called?
While most people simply call them “mouth sores,” there are several different types, each with its own medical name, cause, and treatment. Understanding whether you have a canker sore, a cold sore, or something else is the first step toward finding relief.
The Most Common Name: Canker Sores (Aphthous Ulcers)
The most frequent answer to “what is a sore in your mouth called” is a canker sore. In the medical world, these are known as aphthous ulcers.
- Appearance: Small, shallow lesions that are usually white or yellow with a red border.
- Location: They occur exclusively inside the mouth—on the tongue, the inside of the cheeks, or the base of the gums.
- Contagion: They are not contagious.
- Causes: Stress, minor injury (like biting your cheek), acidic foods (citrus), or vitamin deficiencies (B12, zinc, or iron).
The Second Most Common: Cold Sores (Fever Blisters)
Many people confuse canker sores with cold sores, but they are very different.
- Appearance: Fluid-filled blisters that eventually crust over.
- Location: They usually appear outside the mouth, on or around the lips.
- Contagion: They are highly contagious and caused by the herpes simplex virus (HSV-1).
- Triggers: Sunlight, stress, or a weakened immune system.
Other Types of Mouth Sores
If your sore doesn’t fit the descriptions above, it might be one of the following:
- Leukoplakia: Thick, white patches on the inside of the cheeks or tongue. These are often linked to smoking or tobacco use and should be checked by a dentist.
- Oral Thrush (Candidiasis): A fungal infection that creates creamy white bumps, often described as looking like cottage cheese.
- Gingivostomatitis: A common infection in children that causes sores on the gums and inside the cheeks, often accompanied by flu-like symptoms.
- Oral Lichen Planus: An inflammatory condition that shows up as lacy, white patches or red, open sores.
How to Treat a Mouth Sore at Home
Most mouth sores (especially canker sores) heal on their own within one to two weeks. To speed up the process and reduce pain, try these tips:
- Saltwater Rinse: Mix a teaspoon of salt in warm water and rinse your mouth several times a day.
- Over-the-Counter Gels: Use products containing benzocaine (like Orajel) to numb the area.
- Avoid Irritants: Skip spicy, salty, or acidic foods until the sore heals.
- Honey: Some studies suggest applying honey to a canker sore can reduce pain and inflammation.
When Should You See a Doctor?
While most mouth sores are harmless, some can indicate more serious health issues, including oral cancer. You should book an appointment with a dentist or doctor if:
- The sore lasts longer than two weeks.
- The pain is uncontrollable with OTC medication.
- You have an unusually large sore or sores that are spreading.
- The sore is accompanied by a high fever or difficulty swallowing.
Summary
So, what is a sore in your mouth called? Most likely, it’s a canker sore if it’s inside the mouth, or a cold sore if it’s on the lips. By identifying the type of sore you have, you can choose the right treatment and get back to eating and speaking comfortably.
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