My mother in law is a 59 year old female, for the last 3 years she has been having a different sensation in both the legs below knees. She describes the sensation as a hollowness or lightness of both legs. Typically, it happens during the night. She is able to sleep during the day sometimes, also there is little or no discomfort during the day. The only thing that seems to relieve this symptom is tying a cloth tightly around each leg or putting pressure with both hands. This is something that keeps her awake for hours on end. Do let me know what can be done in such cases. Many thanks.