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Changes in your eating

Salivary gland cancer and its treatment can affect how you eat. Find out more and about what you can do to make it easier to cope.

Dry mouth

If you just have surgery for your cancer, you probably won’t notice a great deal of difference in how moist your mouth is after surgery.

Your other salivary glands will make enough saliva to keep your mouth moist.

After radiotherapy to the head and neck area a dry mouth can make eating and talking uncomfortable.

Your doctor can prescribe artificial moisteners for your mouth and stimulants for your salivary gland if it is a problem for you.

People who have a dry mouth often find it helps to sip water regularly and carry a bottle of water with them all the time.

It is important to try to keep your mouth moist. A dry mouth can make you more likely to get an infection or tooth decay.

It is important to have regular dental check ups.

Loss of taste

Radiotherapy and some chemotherapy drugs can affect your taste buds. So, if you have these treatments you may notice a change in how food tastes.

Some people say their food has a bitter, metallic or salty taste. Or that all food tastes the same. This usually improves over time but for a very few people it can be permanent.

Weight problems

Some people have lost weight when they are diagnosed with cancer. Pain when you are chewing or swallowing, can put you off eating.

It can also be difficult to eat during treatment. Once treatment finishes you may need to build yourself up again. This can be difficult if you are still off your food.

Choose full fat versions of food such as milk and yoghurt rather than the low fat versions you might normally choose if you need to put on weight.

You may also find that it helps to eat little and often, rather than trying to cope with a whole plateful in one go.

Your doctor can prescribe liquid food, which contains all the vitamins, proteins and carbohydrates you need for a balanced diet if you are finding it difficult to eat. They can also refer you to a dietician.

Sweating of the face when you eat

This is called Frey’s syndrome or gustatory sweating. It can happen after surgery to remove a parotid gland tumour.

Between 5 and 50 out of 100 people (5 to 50%) have Frey’s syndrome after surgery.

When your surgeon removes the parotid gland they will also cut the nerves in the area around it.

As part of the healing process, the nerves that control saliva production sometimes link to the nerves that control sweating on the side of the face you have surgery.

This means that when you eat, rather than producing saliva you produce sweat and you may also feel warm and have some reddening on the affected side of the face.

For most people the sweating is very mild and doesn’t need treatment. If you do have it and find it difficult to cope, talk to your doctor.

There are treatments that can help including creams that you put on your face to help stop the sweating and Botox injections into the area.

You can have the injections more than once if they don't work or stop working. Very rarely your doctor may suggest surgery.

Other problems

After the first week, most people have very few problems. The problems you are likely to have depend on the treatment you have had.

Surgery to your mouth or jaw can cause pain and numbness in the area, which can make chewing difficult. You may not be able to move your lips very well which makes it difficult to keep food in your mouth when eating.

Once you have healed and the pain has eased, you should be able to chew normally again. This usually takes about 4 weeks. Until then you may need to have a soft diet.

pproblems with chewing may last longer if you have numbness from damage to the nerves in your head and neck. Some people need to have reconstructive surgery or a dental prosthesis put inside their mouth to help them chew and swallow.

Your own surgeon is the best person to talk to about this if you are worried.

Last reviewed: 
04 Aug 2014
  • Management of Frey syndrome.
    Remco de Bree and others
    Head and Neck (2007) Aug;29 (8):773–8

  • Prognostic factors in malignant tumours of the salivary glands.
    Paul M Speight and A.WilliamBarrett .
    The British Journal of maxillofacial surgery (2009) Dec;47(8):587–93

  • Cancer and its management (6th edition)
    J Tobias and otehrs
    London, Blackwell Science, 2010

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