Some people with advanced illness have a dry mouth, because they produce less saliva or they breathe more through their mouth due to breathlessness.
Oxygen treatment can also cause a dry mouth. Radiotherapy to the head and neck and certain drugs can be another cause. Speak to your doctor if it’s likely that a drug is causing your dry mouth, as a replacement drug may be available. Feeling anxious can also make your mouth feel dry.
A dry mouth can be uncomfortable and change the way your food tastes.