Tooth decay eventually gives way to cavities. When your dentist detects a cavity in your tooth, he'll likely fill the cavity with material to avoid further decay and sensitivity. The filling process is done under local anesthetic, so immediately after the procedure your mouth may feel strange.

If you have a white or red, painful sore on your tonsil, you may be suffering from a canker sore. Canker sores, known medically as aphthous ulcers, are legions that can form anywhere in the mouth. Generally, canker sores can be treated using home remedies, if your doctor approves.

Dry mouth, also called xerostomia, can cause serious problems that affect the enjoyment of food and the condition of the mouth. Without saliva, food and bacteria linger in the mouth, accelerating tooth decay. In addition, lack of saliva alters the taste of food and prevents the start of digestion.

Most consumers purchase toothpaste and other personal hygiene products without even bothering to read the list of ingredients, blindly trusting manufacturers to have the customer’s best interests at heart. It can be a costly mistake.

If you have periodontal, or gum, disease, you are not alone. Periodontal disease affects approximately 75 percent of adults over age 30, according to the Ontario Dental Hygienists' Association.

Thumb-sucking is a common habit among young children because it offers comfort and security. Many children begin sucking their thumb in utero and continue the habit through the infant and toddler years.

Tongue fungus is a form of mucocutaneous infection, or thrush. It is due to a yeast, a single-celled budding organism, most often Candida albicans. According to the Lab Technologist site, there are 600 known microorganisms that inhabit a healthy human’s mouth and are considered normal flora; Candida is one of them.

People with food allergies develop irritating and, in some cases, life-threatening symptoms soon after eating the offending food. Symptoms of a food allergy range from hives to difficulty breathing. Developing a swollen tongue after eating can indicate a food allergy, but having a coating on your tongue does not.

Tooth pain while walking or running can be caused by several dental problems. Anytime you experience oral pain upon impact of your foot hitting the ground, make an appointment with your dentist. If no problem is found, a sinus infection is most likely the cause of the pain.

Toothache pain can range from mild to unbearable, with most causing a constant ache, throbbing pain when chewing, a sore jaw and a general feeling of illness. Most toothaches result from tooth decay, according to MayoClinic.com.

The sinus cavity is located in your face and head. It is composed of air pockets, and some are in close proximity to your jaw. When a dentist completes any type of oral surgery, he must take care that the tools he uses do not disturb the sinuses.

Bad breath, or halitosis, in children is often the result of bacteria building up between teeth or on the back of the tongue. In other cases, certain foods that your child eats, sinus conditions, improper dental hygiene or an underlying medical condition might be the culprit.