Sciatica can be miserable.
The pain may begin in the lower back or buttock and travel down the leg, sometimes accompanied by burning, tingling, numbness, or weakness.
Most cases of true sciatica occur when a nerve root in the lower spine becomes compressed or irritated, commonly because of a herniated disc or bone spur.
But there’s another problem worth knowing about: vitamin B12 deficiency.
Vitamin B12 deficiency doesn’t usually cause true sciatica, but it can damage nerves and produce symptoms that may sometimes resemble nerve problems in the legs.
Why Vitamin B12 Matters for Your Nerves
Vitamin B12 is an essential nutrient your body needs to maintain healthy nerve cells and produce healthy red blood cells and DNA.
When B12 levels become seriously low, neurological problems can develop.
These may include:
Tingling or “pins and needles” sensations
Numbness in the hands or feet
Muscle weakness
Problems with balance or walking
Other neurological changes
Importantly, neurological symptoms of B12 deficiency can sometimes develop even when a person doesn’t have obvious anemia.
That’s one reason persistent unexplained numbness or tingling shouldn’t simply be ignored.
Can Vitamin B12 Deficiency Cause Sciatica?
This needs an important distinction.
Vitamin B12 deficiency can damage peripheral nerves, but it isn’t considered a common cause of true sciatica.
Sciatica refers specifically to symptoms resulting from irritation or compression involving the nerve roots that form the sciatic nerve.
