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What part of your leg is involved? Is it continuous or does it come and go? Are there any fasciculations (tiny tremors) in the muscles of the leg?
I feel it from my knee down to my toes. It feels like its going numb and I also feel the tingling sensation. So far it comes and go and do not feel tiny tremors in the muscles.
While I cannot diagnose you, obviously, without examining you and knowing your history, on the face of it this problem does not sound like a slipped disc in the low back or a nerve compression problem. It is unlikely to be a peripheral neuropathy because it comes and goes and only involves one leg.
If it is positional (e.g. occurs after sitting awhile), it may be a circulation problem. For example, the femoral artery at the groin may be getting compressed transiently, reducing flow to the extremity, or you might have peripheral vascular disease. You should make an appointment to see your family doctor for a physical exam. He can check your pulses, and your nerve integrity, and order any test that is indicated, including tests of circulation and nerve function.