Finding a sore in your mouth can raise questions quickly. Some spots heal on their own, while others deserve a closer look. Knowing the difference between a common canker sore and oral cancer symptoms can help you decide when it’s time to see a dentist—and when it’s safe to wait it out.
At Hart Family Dentistry in Marietta, GA, we focus on clear answers and practical guidance so you can feel confident about your oral health.
What Is a Canker Sore?
A canker sore (also called a mouth ulcer) is a small sore that forms inside the mouth. These sores are very common and typically harmless, even though they can be uncomfortable.
Canker sores usually:
- Appear white or yellow with a red edge
- Cause pain or burning
- Develop on the cheeks, lips, or under the tongue
- Heal on their own within 1–2 weeks
They are often triggered by stress, minor mouth injuries, acidic foods, or immune responses.
What Are Oral Cancer Symptoms?
Oral cancer symptoms involve changes in the mouth that do not heal and may slowly worsen over time. Early oral cancer is often painless, which makes regular dental exams especially important.
Common oral cancer symptoms include:
- A sore that lasts longer than two weeks
- Red or white patches inside the mouth
- Lumps, thickened tissue, or rough areas
- Persistent jaw or tongue discomfort
- Difficulty chewing or swallowing
- Numbness in the lips or mouth
- Unexplained bleeding
These symptoms don’t automatically mean cancer, but they do mean a dental evaluation is needed.
Difference Between a Mouth Ulcer and Oral Cancer
One of the easiest ways to tell the difference between a mouth ulcer and oral cancer is healing time.
A canker sore follows a predictable pattern—it hurts, improves, and heals. Oral cancer symptoms tend to linger, change, or grow.
Other differences may include:
- Canker sores are usually painful; early oral cancer often isn’t
- Canker sores shrink as they heal; oral cancer symptoms persist
- Oral cancer may cause tissue thickening or color changes
If something in your mouth isn’t improving after two weeks, it’s best to have it checked.
How Long Should a Mouth Sore Last?
Most canker sores heal within 7–14 days. If a sore:
- Has not healed after two weeks
- Keeps returning in the same area
- Appears larger or more irregular
- Begins bleeding without explanation
it’s time to schedule a dental visit.
Why Oral Cancer Symptoms Can Be Easy to Miss
Oral cancer often develops quietly in its early stages. Without pain or obvious changes, it’s easy to assume a sore is minor irritation.
Dentists are trained to spot subtle changes during routine exams. This is why regular checkups play an important role in early detection.
Who Should Pay Extra Attention to Oral Cancer Symptoms?
Oral cancer can affect anyone, but risk increases with:
- Tobacco use
- Heavy alcohol consumption
- HPV exposure
- Age 40 and older
- Long-term sun exposure to the lips
According to the American Cancer Society, early detection greatly improves treatment outcomes.
When to See a Dentist
Schedule an appointment if you notice:
- A mouth sore lasting longer than two weeks
- Changes in color or texture inside the mouth
- Lumps, swelling, or thickened tissue
- Difficulty chewing, swallowing, or speaking
A dentist can determine whether the area is harmless or needs further evaluation.
What Happens During an Oral Cancer Screening?
During a screening, your dentist may:
- Visually examine your mouth, tongue, and throat
- Gently feel the tissues for abnormalities
- Review your symptoms and medical history
These screenings are often part of routine dental visits, which play an important role in catching changes early. Learn more about how often dental checkups are recommended.
What You Can Do at Home
For typical canker sores:
- Avoid spicy or acidic foods
- Use a soft toothbrush
- Rinse with salt water
- Manage stress
- Avoid harsh or abrasive treatments that can irritate tissue.
For additional trusted information, visit:
- American Dental Association – Oral Cancer
- Mayo Clinic – Mouth Cancer
Key Takeaways
- Canker sores usually heal within two weeks
- Oral cancer symptoms often do not heal
- Pain is not always a warning sign
- Regular dental exams help catch changes early
- When in doubt, it’s best to get checked
Concerned About Oral Cancer Symptoms?
If you have a mouth sore that isn’t healing or want peace of mind, we’re here to help.
📞 Contact us at (770) 926-8371
🗓️ Schedule your appointment online
📍 Visit us at 3735 Canton Road, Marietta, GA 30066