Suggest Treatment For Numbness In The Leg

I'm a 36 yeard old male, and I'm getting numbness in my left leg between my hip to just above my knee. The only time there is any pain is after it's been numb for a while. The only way to get the feeling back is to move around. It goes numb when I'm sitting, standing and laying down. The only time that it doesn't go numb is when I'm moving around. What could be wrong, and is it serious? I don't have insurance, so should I go to the er for this?