What Happens During an Oral Cancer Screening?

Published May 26, 2025
3 min read
Cornwall Dental Arts team
Oral Health

Of everything that happens during a dental checkup, the oral cancer screening may be the least noticed — and the most important. It takes only a few minutes, involves no discomfort, and its whole purpose is to catch changes in your mouth long before they cause symptoms. Here’s exactly what to expect.

Why screening matters

Oral cancers are far more treatable when found early, but early changes rarely hurt and often hide in places you can’t easily see — under the tongue, the floor of the mouth, the back of the throat. That’s why routine screening at every dental exam matters, whether or not you have risk factors.

Some factors do raise risk — tobacco and vaping, heavy alcohol use, significant sun exposure (lip cancer), and HPV infection, now a leading factor in throat cancers among younger adults. We’ve covered two of these in depth already: The Importance of HPV Vaccination for Your Oral Health and The Effects of Smoking and Vaping on Your Oral Health. But a meaningful share of oral cancers occur in people with no classic risk factors at all — which is why everyone gets screened.

Step by step: the visual and physical exam

During your oral cancer screening, your dentist will:

Look — systematically checking your lips, cheeks, gums, tongue (top, sides and underneath), the floor and roof of the mouth, and the back of the throat for colour changes, white or red patches, sores or unusual textures.
Feel — gently palpating the tissues of the mouth, jaw and neck for lumps, thickened areas or tenderness, including the lymph nodes.
Ask — about anything you’ve noticed: a sore that hasn’t healed in two weeks, numbness, difficulty swallowing, a persistent hoarse voice, or a lump you can feel with your tongue.

That’s it. No instruments beyond a mirror and light, no discomfort.

The VELscope: seeing what eyes can’t

At Cornwall Dental Arts we also use the VELscope, a handheld device that shines a safe blue light into the mouth. Healthy tissue fluoresces in a characteristic way under this light; abnormal tissue shows up darker. It adds about two minutes to the exam, involves no contact, no rinses and no radiation — and it can highlight changes below the surface before they’re visible to the naked eye.

A VELscope finding doesn’t mean cancer; inflammation and other benign conditions can also show up. It means “worth a closer look.”

What if something is found?

Most findings turn out benign — irritation from a sharp tooth edge, a bite injury, a canker sore. Depending on what’s seen, your dentist may simply re-check the area in two to three weeks (many harmless lesions resolve on their own), remove the source of irritation, or refer you to a specialist for a biopsy if the area persists. The point of screening isn’t to alarm — it’s to make sure nothing that matters goes unwatched.

When did you last have one?

If you’re due for a checkup, your screening is built in. If you’ve noticed a sore that hasn’t healed within two weeks, don’t wait for your next scheduled visit.

Call (613) 932-2058 or request an appointment.

FAQ

How often should I be screened for oral cancer?

At every routine dental exam — typically every six months. People with higher risk factors may be advised to come more often.

Does an oral cancer screening hurt?

No. It’s a visual and gentle physical exam, plus an optional light-based scan. Nothing about it is uncomfortable.

Is the VELscope exam necessary if my mouth looks fine?

That’s exactly when it’s most useful — it’s designed to reveal changes that aren’t yet visible on the surface.

What symptoms should I never ignore?

A mouth sore that hasn’t healed after two weeks, a persistent lump, unexplained numbness, white or red patches, difficulty swallowing, or ongoing hoarseness. Any of these deserves a prompt exam.

This article is provided for general education and does not replace a dental examination, diagnosis, or individualized treatment plan.