Thanks for your query.
Seems to be restlessleg syndrome. There is no cause for this disease but usually it is due to over activity of the brain. I would suggest you to get your serum B 12 estimation as some time this can cause RLS
. Meanwhile I have following suggestions for you.
1. Try to sleep at a fixed time, avoid late night sleep. Avoid coffee in night time.
2. If you would be my patient, then I would suggest you Amytryptalin daily.
ointment local application will also give relief.
4.After B 12 test is done you can also take Methylcobal tablet daily.
I do hope that you have found something helpful and I will be glad to answer any further query.