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Dry mouth syndrome

3-minute read

Dry mouth syndrome refers to when you don't produce enough saliva. It is also called xerostomia. Sometimes dry mouth syndrome is just a nuisance, but some people find it affects their health, teeth and gums, and even their quality of life. It is often a side-effect of medicines, so talk to your doctor if you think you have dry mouth syndrome.

Types of dry mouth syndrome

Saliva is produced by the salivary glands in your mouth. It plays an important role in washing away food from your teeth, keeping bacteria under control in your mouth, helping you taste, chew and swallow, and in helping digestion.

Dry mouth syndrome refers to when the salivary glands stop producing enough saliva. This can happen for many reasons, including:

Sometimes dry mouth syndrome is caused by conditions that stop the salivary glands from working properly, such as Sjögren’s syndrome, scleroderma, systemic lupus erythematous, hepatitis C infection, rheumatoid arthritis, anorexia nervosa, or bulimia.

Dry mouth syndrome symptoms

As well as having a very dry mouth, in severe cases people with dry mouth syndrome may find it difficult to speak, eat or swallow. This can lead to further health problems, including malnutrition or problems with the teeth, mouth or throat.

Other symptoms include:

  • saliva that feels thick and stringy
  • a sore throat
  • feeling thirsty
  • needing more liquids to help you swallow
  • changes to your sense of taste
  • dry or cracked lips
  • a hoarse voice or a cough
  • dry eyes, nose or corners of the mouth
  • mouth ulcers
  • white patches in your mouth (yeast infection)
  • bleeding gums
  • tooth decay

Dry mouth syndrome diagnosis

Your doctor will have a close look at your mouth and will ask about any medicines you are taking. Sometimes they may order tests, including blood tests or imaging to see why the salivary glands aren’t working or whether there is another medical reason for the problem.

Dry mouth syndrome treatment

Sometimes dry mouth syndrome can be easily fixed if you stop taking the medicine that is causing it. However, you should not make changes to your medication without first consulting your doctor.

Your doctor will also recommend products to keep your mouth moist and to protect against tooth decay, such as mouth washes, moisturisers or artificial saliva. There are also medicines available to stimulate your salivary glands to produce saliva.

It is important to treat problems in your mouth caused by dry mouth syndrome, such as thrush, mouth ulcers and dental problems.

Living with dry mouth syndrome

You can ease the discomfort of dry mouth syndrome by:

  • sipping water regularly (but avoiding sugary drinks, fruit juice or cordial)
  • rinsing your mouth with water after you eat
  • chewing sugar-free gum to stimulate saliva
  • quitting smoking
  • avoiding foods that irritate your mouth, such as citrus foods, spicy foods, foods with sharp edges like crackers or chips, or alcohol
  • trying to breathe through your nose rather than your mouth
  • keeping the air in your bedroom moist with a humidifier
  • using moisturiser on your lips, preferably with SPF 30+ sunblock

Dry mouth syndrome greatly increases your chance of getting tooth decay or gum disease. It is very important to see your dentist regularly and to protect your teeth by:

  • using a soft toothbrush and flossing
  • using a prescription toothpaste, if recommended by your dentist
  • avoiding toothpastes that cause your mouth to burn
  • using mouth rinses
  • avoiding sugary or acidic foods

If you wear dentures, make sure you keep them very clean. Rinse them after meals, brush them daily with a soft brush and mild soap (not toothpaste) and soak them in water overnight. Speak to your dentist if your dentures don’t fit well.

Last reviewed: April 2018

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