Restless leg syndrome is caused by lack of iron or flawed use of it by the brain. Iron is used by brain to produce a chemical called dopamine which helps brain control the movements of the body.

The lack or improper use of iron can be caused by many conditions that include diabetes, kidney failure, rheumatoid arthritis, pregnancy or Parkinson’s disease.It is seen that persons with family history of RLS are more vulnerable so it suggests that heredity may play a role.Damage to the nerves of the legs can also cause RLS. Some medicines can also cause RLS. Substances like tobacco and alcohol can cause or worsen restless leg syndrome.