Needles, or Numbness
Tingling in the hands, feet, legs, or arms is one of the most important warning signs of vitamin B12 deficiency. People often describe it as pins and needles, burning, crawling sensations, or numbness.
This happens because B12 is important for nerve health. If deficiency continues untreated, nerve symptoms may become more serious. The NHS lists pins and needles and problems with movement as neurological symptoms linked with vitamin B12 deficiency.
If tingling or numbness keeps returning, especially in both feet or hands, it should be checked.
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