I have been receiving pain in my legs ever since I was a child. Sometimes in both legs and sometimes in just one. I usually don't get it while I'm doing activity, it's mostly when I'm resting. It usually lasts 1-3 hours. The pain is usually around my thighs, if I walk, stretch, or apply pressure to my legs it usually feels better, but as soon as I stop I feel the pain. The pain isn't burning, it makes my legs feel heavy and numb, kind of like stretching and staying in that position for a long time, it doesn't really feel like that but that's the only thing I can kind of associate it with. It doesn't feel like my thigh is asleep ( if that's even possible). What could this be? I've had this pain ever since I was a little girl, could it be something serious? I have some back problems but they are MILD and I didn't have them while I was a little girl and I still received pain. Thanks