upper leg (thigh) pain

I have had radiating pain in my thigh that started about 2 years ago then stopped and now it is starting again. It only happens when I am in bed.  When I awake and start to get out of bed is when I get this stabbing pain. I now have  lumps in my thigh where the pain is since this has started. I also feel heat and numbness along with the pain.  When I get out of bed and start walking around it goes away. When I stretch my legs before getting out of bed it seems to be worse, however it seems to go away when I stretch my upper back and shoulders. What do you think my problem is?