Mouth Disorders
Educational information. Individual clinical review of this presentation by Dr. Ehsan is not yet documented. It does not replace personal medical evaluation.
Source: MedlinePlus, National Library of Medicine. Read the original source
MedlinePlus data edition September 26, 2026. Imported September 27, 2026. These dates do not indicate a new clinical review of the article.
Your mouth is one of the most important parts of your body. It has many different functions. It allows you to:
- Take in food and drink
- Breathe in air
- Start digestion, with your teeth chewing the food you eat and your salivary glands releasing saliva to help break down the food
- Speak and sing
- Show emotion, by smiling or pouting
Any problem that affects your mouth can make it hard to eat, drink, or even smile. Some common mouth problems include:
- Cold sores - painful sores on the lips and around the mouth, caused by a virus
- Canker sores - painful sores in the mouth, caused by bacteria or viruses
- Thrush - a yeast infection that causes white patches in your mouth
- Leukoplakia - white patches of excess cell growth on the cheeks, gums or tongue, common in smokers
- Dry mouth - a lack of enough saliva, caused by some medicines and certain diseases
- Gum or tooth problems
- Bad breath
Treatment for mouth disorders varies, depending on the problem. If a mouth problem is caused by some other disease, treating that disease can help. It is also important to keep your mouth clean and healthy by brushing, flossing, and not using tobacco.
Symptoms, tests and care options
Further reading selected by MedlinePlus. Links open the original organizations’ websites.
- Mouth Problems · American Academy of Family Physicians
Questions for your care team
General prompts to help prepare for your appointment.
- How does this information apply to my situation?
- Which symptoms or results need evaluation?
- Which tests are useful, and what can they tell us?
- What care options, benefits, and risks should we discuss?
- When should I seek urgent help, and whom should I call?
- When is follow-up, and how will we know whether the plan is working?
For a life-threatening emergency, call 911 in the U.S. or your local emergency number.
Browse all patient guides