Leg numbness/tingling sensation for 13 minutes despite trying to move/shake them. leg/thigh/feet tenses up. sometimes theres burning. havent been sitting long or not moving ( about 8 minutes prior) . happens when sitting on toilet the most. ideas?

Normal: Sitting on a hard toilet seat puts pressure on the backs of the thighs where nerves travel from your spinal cord to your legs. It is very possible that even 8 minutes on the toilet seat could cause enough pressure to limit the nerve transmissions and cause numbness and tingling, especially if leaning forward with arms pressing down on thighs.