What is the cause for numbness of legs?

Q: I experience numbness in my legs if I sit down on the floor for even a few minutes. Is it due to weakness?

A:If this numbness is experienced only for the duration you are sitting and is especially marked when you sit cross-legged, it may be due to stretching of nerves in your legs in that posture. It is best to avoid the position in which you are experiencing this numbness.