article_snippet: In many cases, the cause of this nerve damage is unknown but this nerve damage can also be caused by poorly controlled diabetes.
article_snippet: Other possible causes include Parkinson's disease, multiple sclerosis and some medications.
article_snippet: It is usually cause by diabetes, Parkinson's or as a complication of surgery, but sometimes there is no clear cause and sufferers report sufferers  after coming down with flu, a virus, food poisoning or after taking antibiotics.