6. Cracked or broken teeth:
A cracked or broken tooth can happen for a variety of reasons—brittle teeth, teeth grinding, injury. The crack may be invisible to the naked eye and even X-ray, but they can be incredibly painful and create bigger problems if left untreated. If you experience pain when chewing see your dentist. They can diagnose the cause and develop a plan for treatment.
7. Jaw pain or poping/clicking in the jaw:
Many things can cause these symptoms, which can make it difficult to diagnose. Possible causes include sinus problems, toothache, arthritis, injury, teeth grinding, gingivitis or problems with your jaw like TMJ. Your dentist will conduct a thorough exam, which may include X-rays, to determine the source of the pain.
8. Dry mouth:
If you have dry mouth it may be the symptom of a medical disorder or a side effect of certain medications. Saliva is the mouth’s primary defense against tooth decay. It washes away food and other debris, neutralizes acids produced by bacteria in the mouth and provides disease-fighting substances throughout the mouth. Your dentist can recommend ways to restore moisture.
9. Oral piercing infection:
Oral piercings can create a wide range of problems for your health, oral and otherwise. Your mouth is home to huge amounts of bacteria, creating an ideal place for infection to start. If you have any signs of infection—swelling, pain, fever, chills, shaking or a red-streaked appearance around the site of the piercing—contact your dentist or physician immediately.
10. Stained or discolored teeth:
Over time your teeth can become stained and change color. This is often the result of eating certain foods, such as coffee or tea, smoking, aging, genetics, injury, or certain medications. Whitening options can include over the counter or in office treatments. Check with your dentist about your options for stain removal.
*source of information from ADA website.