It is important that you know why you have left leg ache and tingling. Knowing the reasons for the pain and the tingling will help you take the appropriate action. You might be able to take action that prevents the exacerbation of the problem.
One of the leading caused of left leg ache and tingling is disorders and diseases that interfere with the function of the nerves outside the brain and the spinal cord (peripheral nervous system). This will lead to a tingling sensation that is more like numbness or pricking. This is a common paresthesia symptom. It might be caused by sleeping in an odd position or standing in the same position for too long.
Another common cause of left leg ache and tingling is sciatica. This is a nerve pain that is caused by herniated or protruding spine disc. The spine is made up of individual vertebra that is connected at facet joints. There are jelly-like pads between the vertebras (intervertebral disc). These discs act as shock absorbers and prevent the vertebra from rubbing against each other. Spine injury resulting from severe compression or strain can cause the bulging or rupture of the intervertebral disc. The bulging or ruptured area puts pressure on any of the many nerves of the spinal cord. The sciatic nerve pressure produces a pain that feels like a bad leg cramp or numbness that is accompanied by a tingling sensation travelling down the leg, mostly the left leg.
Left leg ache and tingling could be caused by peripheral artery disease (PAD). This disease affects about 8 million people in the U.S. It occurs when the pelvis in your pelvis and your legs become narrow due to atherosclerosis. Atherosclerosis is buildup of the cholesterol, fat, mineral, and calcium containing plaque in artery walls. The accumulation of plaque leads to the formation of scar tissue on the walls of the damaged blood vessel, making it narrower. As the artery running through your left leg narrows, the flow of blood (and consequently oxygen) reduces, leading to numbness accompanies by tingling and pain. The pain is often associated with the pain resulting from back injury.
Another common cause of left leg ache and tingling is multiple sclerosis. This is a common autoimmune disease affecting the central nervous system. It attacks myelin which is the fatty substance that covers the nerves.
The damaging of myelin leads to the formation of scar tissue. The scar tissue interferes with the signals that are sent between nerves. One of the symptoms of multiple sclerosis is numbness and tingling down one leg (or both). In extreme cases, the condition develops to paralysis.
Rheumatoid arthritis and systemic lupus erythematosus cause lower leg tingling in over one million people across the U.S. Scleroderma causes lower leg tingling in about 200,000 people in the U.S. Other conditions that are associated with tingling of the lower left leg include dermatomyositis, polymyositis, cold agglutinin disease, cryoglobinemia, mixed connective tissue disorder, and sacral plexopathy.
You could get tingling on your left leg as a result of carpal tunnel syndrome (CTS). This is caused by such medical conditions as seizures, diabetes, multiple sclerosis, strokes, Raynaud's phenomenon, and underactive thyroids.
Muscle cramp (charley horse) causes left leg pain (not necessarily accompanies by tingling). The most common causes of cramps are dehydration, low amount of sodium, magnesium, potassium, or calcium in the blood, medications like diuretics and statins, and muscle strain or fatigue from overuse, holding a muscle in the same position, and too much exercise.
The left leg ache and tingling could be as a result of injury. The injury could be strain (an overstretched or torn muscle), stress fracture (hairline bone crack), tendinitis (inflamed tendon), or shin splints. Atherosclerosis could be the cause of your leg pain. This is the blockage of blood flow in leg arteries, leading to a pain called claudication. You usually feel the pain when walking or exercising. Rest can relieve it. Other causes of left leg pain are blood clot (deep vein thrombosis), infection of the soft tissue (cellulitis), the bone (osteomyelitis) or skin, inflammation of the leg joints resulting from gout or arthritis, nerve damage, and varicose veins.