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10 Shocking Illnesses Dentists Find First

Dentists aren’t just looking for gum disease or cavities; they might also find signs of Crohn's disease, oral cancer, and other serious conditions.


Dental checkups may reveal more than you realize

“People think we’re only looking at teeth,” says Gigi Meinecke, DMD, spokesperson for the Academy of General Dentistry and a dentist in private practice in Potomac, MD. “But typically we’re looking at all of the soft tissues in the mouth.” This access can allow dentists to identify a number of surprising conditions—from diabetes to GERD—possibly before you or your doctor are aware of them. Here are the most common diseases your dentist might be able to detect. (Here are the 13 things every dentist wants you to know before your next appointment.)


Crohn's disease

Up to 20 percent of patients with this inflammatory bowel disorder develop lesions in their mouth that may even precede abdominal symptoms such as cramps and diarrhea, according to a 2010 study from the Medical University of South Carolina in Charleston. Dr. Meinecke says that she’s seen swollen lips and dime-sized ulcers on the inside of cheeks and lips—a white center with a red halo circling it. If she suspects Crohn disease, she’ll do X-rays to rule out gum disease and ask about medical history and medications. “If I can’t find a reasonable explanation for the symptoms, I’ll recommend they see their regular doctor,” she says.



Bleeding, receding, dry gums, dry mouth, and wiggly teeth are all typical oral symptoms of patients with diabetes, who are more likely to get gum disease, says Sam Morhaim, DDS, a periodontist in Great Neck, New York. However, many of these symptoms result from simple bad hygiene, so dentists may not assume it’s diabetes unless other risk factors are there, or you have these symptoms despite taking good care of your mouth. If your dentist suspects signs of diabetes, he’ll likely recommend a blood test at your primary care doctor’s office. Oral health and diabetes management are closely linked, Dr. Morhaim notes. Patients who take better care of their teeth and gums may have better blood sugar control; patients with better blood sugar control may have less severe cases of gum disease. If you've also got a mouthful of cavities from all the sweets you love, make sure you avoid these foods that dentists swear they never eat.


Oral cancer

Oral cancer is the sixth most-common cancer in America, with 30,000 new cases reported every year. Regular dental visits can help catch signs of it in its earliest stages, when survival rates are more than 80 percent. Oral cancer shows up as white and red lesions, usually on the tongue, the floor of the mouth, and the soft palate tissues in the back of the tongue, according to Delta Dental. Early on, the lesions are usually painless and tough for patients to spot themselves. Ask your dentist to perform an oral cancer screening during checkups. It’s particularly important if you have risk factors for the disease, including smoking, heavy alcohol use, and exposure to the HPV (the same virus that causes cervical cancer). And don't miss these 37 secrets your dentist will never tell you!



If the lining of someone’s mouth is very pale—a light shade of pink—dentists might suspect anemia, a condition in which the body doesn’t have enough red blood cells circulating, says Dr. Meinecke. As well, the tongue can lose its typical bumpy texture and become smooth looking.


GERD (gastrointestinal reflux disease)

Stomach acid—with a pH that’s lower than vinegar—that regurgitates into the esophagus and mouth can dissolve tooth enamel and create erosive lesions near the back of the mouth. While many people with GERD recognize it by the uncomfortable heartburn symptoms, some patients only experience GERD while they sleep and may not know they have it. “It’s common for patients to say they’re having trouble sleeping and not know why they’re waking in the middle of the night,” says Dr. Meinecke. She advises patients with GERD symptoms to consider proton-pump inhibitors like Nexium and Prevacid, which reduce acid production. (Make sure you know these 30 everyday mistakes that are secretly ruining your smile!)


Intense stress

You certainly know when you’ve had a rough week at work, but the state of your mouth may indicate that stress is taking a more serious toll than you realize. Many people may grind their teeth—a condition known as bruxism—in response to stress, which can wear down and chip your pearly whites, notes WebMD. Swear you’re not a tooth grinder? Dr. Morhaim says most of his patients tend to do it at night while they’re sleeping. A customized night guard to wear while you sleep may help. 

x-rayPuwadol Jaturawutthichai/Shutterstock


The bone disease is difficult to detect because it has no symptoms, which means most people don’t know they have it until they get a bone fracture or take a bone density test. However, an annual trip to the dentist’s office may be just what your bones need before it’s too late. "Osteoporosis does not cause changes in the teeth, but it does cause changes in the bone that supports the teeth," Alyson Hope Koslow, DDS, a clinical assistant professor of restorative dentistry at the University of Illinois Chicago told Everyday Health. "This may show up as a receding gum line and loose teeth." And bone loss in the mouth typically means there are signs of bone loss elsewhere in the body. These are the 10 things dentists always do to prevent their own teeth from rotting out of their mouth!


Memory loss and confusion aren’t the only warning signs of the early stages of dementia – poor oral hygiene is too! In fact, researchers from the University of California followed nearly 5,500 senior citizens for 18 years and found that those who brushed their teeth less than once a day were up to 65 percent more likely to develop dementia than those who brushed their teeth every day. The lead author of the study told Reuters Health that gum disease bacteria might make its way to the brain causing inflammation and brain damage.

legs older person, Knee Pain, elder osteoarthritisojoel/Shutterstock

Rheumatoid Arthritis

Rheumatoid arthritis may cause joint pain and swelling, but early signs of the autoimmune condition can also appear in your mouth, especially in young people. Patients with jaw swelling, an achy jaw, or who can’t open their mouth too wide, may mean they suffer from early-onset rheumatoid arthritis.

Heart attack concept. Young man suffering from chest pain, close upAfrica Studio/Shutterstock

Heart Disease

Swollen, red, bleeding gums may be a telltale warning sign of heart disease. In fact, gum disease may put you at risk for both coronary artery disease and heart disease because the bacteria could travel to your heart and form blood clots or build up plaque in your arteries, which can be detrimental to your heart’s blood flow. “People with periodontitis [gum disease] often have risk factors that not only put their mouth at risk but their heart and blood vessels, too,” Ann Bolger, MD, William Watt Kerr Professor of Clinical Medicine at the University of California, San Francisco told the American Heart Association. “But whether one causes the other has not actually been shown.” If you often suffer from bleeding gums, try getting into one of these 11 habits your dentist wants you to start right now!