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Canker sores, cold sores, and mouth sores: What's the difference?

January 28th, 2026

At Henricksen Family Dental, we know many people have experienced some form of mouth sores or irritation. Some mouth sores are harmless and go away on their own after a few days, while others are more serious and should not be ignored. Mouth sores occur for many different reasons, but bacterial infections, viruses, or funguses often trigger them. The best way to tell the difference between a canker sore and a cold sore is that canker sores occur inside the mouth while cold sores occur on the outside the mouth.

The most common mouth sores are:

Canker sores: A non-contagious, small, grayish ulcer with a red border, canker sores appear inside the mouth. While outside factors such as stress, fatigue, or allergies may increase the chances of developing a canker sore, most health experts believe they stem from bacteria or a virus that attacks the immune system. Canker sores typically heal within a week or two.

Cold sores: Also called fever blisters, cold sores are contagious groups of fluid-filled blisters that often erupt around the lips and sometimes under the nose or around the chin. Cold sores are the result of the herpes simplex virus, and once infected, the virus remains in the person’s blood stream.

Leukoplakia: A potential warning sign of oral cancer, leukoplakia is a premalignant lesion that appears as a white patch on the inside of the mouth, tongue, or gums. The lesions, which are caused by excessive cell growth, usually afflict those who smoke tobacco. Dr. Henricksen may choose to have the lesion biopsied if the outbreak appears severe.

Oral candidiasis: Also called oral thrush or moniliasis, this condition is caused by the overgrowth of a type of yeast called candida. Common symptoms of oral candidiasis include white spots inside the mouth and on the tongue, redness or discomfort in the mouth area, sore throat,difficulty swallowing, and cracking at the corners of the mouth. It is important to visit Dr. Henricksen if you have oral candidiasis. If left untreated, it may infect your bloodstream, which can be very dangerous. Healthy adults do not usually get thrush, and the condition is most often seen in infants, the elderly, patients undergoing chemotherapy, or people with AIDS or other diseases that are known to weaken the immune system.

Should you have a mouth sore that lasts a week or longer, we encourage you to give us a call and schedule an examination at our Chehalis office.

Understanding Cavities

January 21st, 2026

Getting a cavity seems like delayed punishment for eating that special dessert every weekend or for the few days you forgot to floss. When you are doing everything right with minimal exception and a cavity is diagnosed, it is discouraging. Knowing how cavities form and what causes them is valuable in knowing how to prevent them. In this blog post, Dr. Henricksen will help you understand cavities!

A cavity is not a one-time event. It is actually a symptom of a disease called caries. Tooth decay is a result of an active infection and condition in the mouth. There are ingredients to this infection, which include bacteria, acid, your tooth, and a food source. The main bacterial culprit is S. Mutans. Bacteria live in a housing structure called biofilm. This offers them protection, food, and an ideal replicating environment.

Biofilm can be healthy if there is a balance of good bacteria. When you have caries, the numbers of “bad” bacteria increase and produce an environment where they thrive and therefore cause tooth decay. A main indicator of this is a pH measurement of your saliva.

Several factors can influence the biofilm pH. Foods and beverages all have different pH levels. The lower the number, the higher the acidity. Since acid promotes tooth decay, a beverage like soda will promote a cavity. Water, being neutral, is a good choice to promote healthy oral pH. Healthy eating can still cause cavities. Here is an example of a highly acidic, yet traditionally healthy meal:

Toast with store-bought strawberry jam, and a cup of cottage cheese topped with fresh cranberries.

Instead, here is a better choice, which involves mixing acidic healthy foods with alkaline (non-acidic) foods to reduce the overall pH:

Toast with almond butter, and Greek yogurt topped with fresh blueberries.

The first example will result in a very low pH in the mouth and even in the rest of the body. The second meal mixes highly acidic blueberries with an alkaline Greek yogurt. Dairy products from cows are highly acidic. Toast is acidic because of the yeast and almonds are alkaline.

A natural buffer is saliva. Whenever mouth breathing or medications compromise the saliva flow, the pH is going to drop and caries can go rampant. Getting a cavity is not just about the sweets or forgotten flossing sessions. It is about the pH levels and bacterial management.

For more helpful tips about how to avoid cavities, contact our Chehalis office.

Are you at risk for oral cancer?

January 14th, 2026

Nearly 40,000 people are diagnosed with oral cancer annually in the United States, with more than 8,000 dying every year from the disease. Oral cancer has a higher death rate than many other common cancers, including cervical cancer, testicular cancer, Hodgkin’s lymphoma, and thyroid or skin cancers. The high death rate results from the fact that most oral cancers go undiagnosed until the disease is well advanced and has spread to another part of the body, most often, the lymph nodes in the neck.

Dr. Henricksen and our team want you to know that cancers of the mouth and throat, which account for about three percent of all cancers in the United States, are largely preventable. However, we want you to know about certain risk factors that affect the likelihood of developing the disease.

  • Use of tobacco products including smoking cigarettes, cigars or a pipe, or chewing tobacco all elevate risk for developing oral cancer. Tobacco use especially, is a serious risk factor because it contains substances called carcinogens, which harm cells in your mouth.
  • Consumption of alcohol in excess can also increase your risk. If you drink alcohol regularly, you have an elevated risk of getting oral cancer. Alcohol abuse (more than 21 drinks in one week) is the second largest risk factor for the development of oral cancer, according to the Oral Cancer Foundation.
  • Excessive sun exposure. People who spend lots of time outdoors and do not use proper amounts of sunscreen or lip balm have a greater risk for developing lip cancer. Exposure to ultraviolet (UV) radiation from sunlight may also cause melanoma, the most serious type of skin cancer.

If you notice unusual lumps, bumps, or red or white patches in your mouth that don’t go away, sores that won’t seem to heal, persistent soreness, or pain or difficulty swallowing please consult Dr. Henricksen and our team immediately.

Other factors that may influence your risk for developing oral cancer include:

  • Age: Oral cancer is typically a disease that affects older people, usually because of their longer exposure to other risk factors. Most patients diagnosed with oral cancer are over the age of 40.
  • Gender: Oral cancer strikes men twice as often as it does women.
  • A history with viral infections, such as human papillomavirus (HPV)
  • A diet low in fruits and vegetables

During your next visit, Dr. Henricksen will examine your mouth for signs of oral cancer. If you have been putting off a visit to our Chehalis office for your regular checkup, now is an excellent time to schedule one. Regular visits can be the first line of defense against oral cancer because we can identify early warning signs of the disease. Give us a call today!

Tooth Protection and Winter Sports

January 7th, 2026

Just because it’s cold out there doesn’t mean you’ll give up keeping fit and active! Winter is the season for some of our favorite team sporting activities, and when you’re donning your protective gear, don’t forget to protect your teeth as well.

  • Basketball

This sport actually tallies one of the highest counts of dental injuries. Running, jumping, and diving for the ball on an unforgiving court can lead to tooth and jaw injuries.  And for every ten men on the floor, it seems like there at least 50 flailing elbows in the paint.

  • Hockey

Notorious for the toll it takes on teeth, hockey is a game of sticks, ice, and whizzing pucks. And when your sport’s penalties include the terms hooking, slashing, and tripping, the more protection, the better.

  • Skiing

When you are flying down the slopes, combining powdery snow and speed, mouth protection is a good idea. This also applies to snowboarding and other snow sports.

  • Wrestling

Grappling and pinning in close quarters can lead to unintended injuries after accidental contact with the mat or your opponent.

Different uniforms, different equipment, and different playing fields, but all these sports have one thing in common—the easiest way to protect your teeth while playing them is with a mouth guard.

Mouthguards generally come in three forms:

  • Over the counter, ready-made appliances. These are available in drugstores and sporting goods stores, but might not be a comfortable fit as they are pre-formed sizes.
  • The “boil-and-bite” option is a mouthguard form placed in hot water. You then bite down to shape it to your mouth and teeth.
  • Custom mouthguards can be fabricated just for you through our Chehalis office. These appliances are designed to fit your individual mouth and teeth, so provide a better fit and better protection. They are also usually more durable and more comfortable. If you wear braces, you definitely need a custom mouthguard to prevent an injury to your mouth or braces caused by an ill-fitting appliance.

Whether you play on a team or pursue individual athletic activities, keeping safe as you keep fit is your first priority. We would be happy to discuss your mouthguard options for any sport, any time of year.