Restless legs syndrome --who is affected and what causes it

Restless legs syndrome affect both men and women, but women twice as often.  The experts aren’t sure what causes this neurological syndrome.  People who deal with restless legs often have chronic diseases such as diabetes, kidney disease, neuropathy, tremors and multiple sclerosis.  Is this coincidence or do the chronic illnesses contribute to restless legs?  No one knows.  They believe there is an inherited tendency and have identified six genes which are risk factors.  Restless legs can begin at any age and may worsen as a person ages.  Iron deficiency anemia can be one treatable cause of restless legs syndrome.