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Tingling or numbness in hands and feet? Blood tests that help

A "pins and needles" feeling, burning soles or numb fingertips usually means the nerves are irritated. Low vitamin B12 and long-standing high sugar are two of the most common reasons in India, and both are easy to check with a blood test. Catching these early matters, because nerve symptoms are easier to manage when the cause is found in time.

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Tests to ask about

Vitamin B12

The most common deficiency behind tingling and numbness.

₹1,090 Book Details
HbA1c

Long-term high sugar can damage nerves in the feet.

₹420 Book Details
Thyroid profile (T3, T4, TSH)

Low thyroid can be linked with nerve symptoms.

₹1,200 Book Details
Calcium

Low calcium can cause tingling around lips and fingers, and cramps.

Kidney function test (KFT)

Kidney problems can affect nerves over time.

₹220 Book Details

Common reasons doctors look for

  • Low vitamin B12 – very common in vegetarians and long-term users of some acidity or diabetes medicines
  • Diabetes or prediabetes affecting nerves
  • Underactive thyroid
  • Low calcium or magnesium
  • Pressure on a nerve – carpal tunnel or a slipped disc in the neck or back
  • Kidney problems or heavy alcohol use

How to prepare

B12, thyroid and calcium need no fasting. If fasting blood sugar is included, fast 8–10 hours; HbA1c can be done anytime.

When to see a doctor

Go to a hospital immediately if numbness starts suddenly on one side of the body or face, or comes with weakness, slurred speech or vision loss – this can be a stroke. Also see a doctor urgently for numbness with loss of bladder or bowel control, or weakness spreading up both legs.

Numbness & Tingling – FAQs

Which test is done for tingling in feet?

Vitamin B12 and HbA1c are the most common first tests, often with thyroid, calcium and kidney function.

Can low B12 cause numbness?

Yes. B12 is needed for healthy nerves, and deficiency commonly causes tingling, numbness and balance problems.

I have diabetes and burning feet. Should I test?

Yes, discuss it with your doctor. HbA1c shows sugar control, and your doctor may examine your feet and nerves.

Is vitamin D related to tingling?

Low vitamin D with low calcium can sometimes cause cramps and tingling. Your doctor may check both.

This page is general information, not medical advice or a diagnosis. Please talk to a doctor about your symptoms.

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