I have been having burning pain down the outside of my right leg around the mid-thigh down to my ankle. I've had no recent injuries and no mobility issues; I am overweight but I have lost 130 lbs and have another 100 to go roughly. Because of this pain, it hurts to sit, stand, or walk -- the pain scale is about 8 out of 10. I need to find out what is going on. Does anyone know what's causing this?