How common is numbness and tingling in vitamin B12 deficiency?

Vitamin B12 supports nerves and blood cells. Low levels can cause pins and needles, reduced sensation, burning, or heaviness in the hands and feet. Symptoms may develop gradually and affect both sides. Other conditions can cause the same sensations, so this symptom alone cannot identify the cause.

Arrange a clinical assessment if symptoms persist, spread, or occur with tiredness, weakness, balance changes, or a sore tongue. A clinician may review diet, medicines, digestion, and blood tests. Do not begin high-dose supplements without advice because treatment depends on the reason for deficiency.

Seek urgent help for sudden one-sided numbness or weakness, trouble speaking, severe dizziness, loss of coordination, or difficulty walking. Contact a clinician soon if symptoms worsen or interfere with daily activities, because prolonged nerve problems may need timely treatment.

Ask whether vitamin B12 testing is appropriate, whether another condition could explain the sensation, and which treatment and follow-up plan fit your results. Mention when symptoms started, where they occur, and any medicines or dietary restrictions.