Our expert says:
It can be caused by various problems: Chronic infections or inflanmmation of the nose, medications, neurological problems (like a stroke or head injury), it can also be age related. See http://www.nlm.nih.gov/medlineplus/ency/article/003052.htm
You may need to see your doctor to try and diagnose the cause and see if it is treatable
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.