What Is The Remedy For Restless Legs,swelling And Burning Feet And Ankles?

I am 88 years old male. Please enlighten me on how I can help alleviate my present malady. Because of the swelling of my feet and ankles-my restless legs and burning feet keeps me awake and I cant sleep. In lying down and elevating both my legs, the swelling calms down temporarily. Is there a cure for this? Can 5-HTP help for my sleepless nights? Hoping to hear from you soon.. Thank You!