screening for numbness

Overview

Numbness is a loss of feeling or sensation in a part of your body. You may also feel tingling, prickling, or a 'pins and needles' sensation. Numbness can happen when nerves are pressed, damaged, or not getting enough blood flow. In most cases, it is temporary and harmless, but sometimes it can be a sign of a more serious problem in your brain, spine, or nerves.

Yes, numbness is very common. Almost everyone has experienced a limb 'falling asleep' from sitting or lying in one position. Persistent or recurring numbness is also a frequent reason people see a neurologist, a doctor who specializes in brain and nerve conditions.

Numbness can affect people of all ages. It is more common in older adults, people with diabetes, those with a history of nerve compression (such as carpal tunnel syndrome), and people who perform repetitive motions at work or during hobbies.

Symptoms

Common symptoms

• Tingling or 'pins and needles' in a hand, foot, arm, leg, or the face
• Loss of feeling or a sense of 'nothingness' in an area of skin
• A burning, cold, or crawling sensation in a limb
• Weakness or a heavy feeling in an arm or leg
• A feeling that a body part has 'gone to sleep'

Symptoms in children

• Temporary numbness in a hand or foot after sitting or sleeping in an awkward position
• Complaints of a 'weird' feeling or difficulty moving a limb
• If it happens after a fall or injury, it should be checked by a doctor

Symptoms in older adults

• A gradual feeling of 'socks or gloves' of numbness in the feet and hands, often from nerve damage related to diabetes or aging
• Numbness along with pain, burning, or difficulty with balance
• Sudden onset of numbness, which could be a warning sign of stroke or poor circulation

Causes

Main causes

• Pressure on a nerve, such as from sitting or sleeping in one position, carpal tunnel syndrome, or a herniated disc in the spine
• Nerve damage (peripheral neuropathy) due to conditions like diabetes, vitamin B12 deficiency, or alcohol misuse
• Problems in the brain or spinal cord, including a stroke, multiple sclerosis, or a brain tumour (when numbness is sudden or one-sided)
• Poor blood flow and circulation issues, such as from a blood clot or narrowing of blood vessels
• Infections that affect the nervous system, like Lyme disease, shingles, or HIV
• Autoimmune conditions, where your immune system mistakenly attacks your own nerves, such as Guillain-Barré syndrome
• Exposure to certain poisons, heavy metals, or some medications (ask your doctor or pharmacist about any you take)

Risk factors

• Diabetes
• Older age
• Obesity or a sedentary lifestyle
• Excessive alcohol use
• Vitamin B12 or folate deficiency
• Repetitive hand or wrist movements, like typing or using power tools
• Herniated discs or arthritis in the spine
• A family history of neurological conditions

When to see a doctor

See a doctor urgently if:

• If you have sudden numbness on one side of your body, or numbness with weakness, drooping face, or trouble speaking, call your local emergency number immediately. These can be signs of a stroke.
• If numbness follows a recent injury or accident, seek urgent medical attention to check for nerve, spinal cord, or blood vessel damage.
• If numbness is spreading rapidly over minutes to hours, it could be a sign of a serious nerve disorder and requires urgent evaluation.

Book a routine appointment if:

• Make an appointment with your doctor or a neurologist if numbness persists for more than a few days without a clear cause.
• If you have numbness along with pain, burning, numbness in your hands and feet, or you notice worsening symptoms, seek a medical evaluation.
• If you have diabetes, high blood pressure, or another known condition that can affect nerves, bring any new numbness to your doctor’s attention at a routine check-up.

Diagnosis

Your doctor will start by asking about your medical history, when the numbness started, where it happens, and if it spreads. They will do a physical and neurological exam to check your muscle strength, reflexes, coordination, sense of touch, and balance. Based on this, they may order tests to look for nerve damage or underlying conditions.

Tests that may be done

• Blood tests to check for diabetes, vitamin deficiencies, thyroid problems, or autoimmune conditions
• Nerve conduction study: a test that measures how well and how fast your nerves send electrical signals
• Electromyography (EMG): a test that uses small needles in muscles to check for nerve or muscle damage
• MRI or CT scan of the brain, neck, or spine to look for herniated discs, strokes, or other structural problems
• Nerve biopsy: in rare cases, a tiny piece of a nerve may be removed for testing

What to expect at your appointment

Most tests for numbness are done as an outpatient. Blood tests are quick, and imaging scans are painless. Nerve studies can feel slightly uncomfortable, like a mild electric shock, but they are short. You will usually get results during a follow-up visit, and your doctor will explain what the findings mean and discuss next steps.

Treatment

Treatment for numbness depends on the underlying cause. The goal is to address the problem that is pressing, damaging, or affecting the nerves. In many cases, treating a condition like diabetes, vitamin deficiency, or a herniated disc can relieve the numbness. Other treatments focus on reducing nerve pain and improving daily function.

Self-care at home

• Protect numb areas from injury: check your feet and hands for cuts, blisters, or pressure sores, especially if you have diabetes or reduced sensation.
• Take regular breaks from repetitive motions, and adjust your desk, chair, or tools to reduce nerve compression.
• Avoid constricting clothing, sitting with legs crossed, or kneeling for long periods, which can press on nerves.
• Move around often if you sit for long stretches: try to stand and walk for a few minutes each hour.
• Follow your doctor’s advice for managing chronic conditions, such as diabetes or high blood pressure.

Medical treatments

Medical care may include physical therapy to improve strength and coordination, and occupational therapy to adapt daily activities around numbness. For nerve pain, doctors may prescribe medications that are not traditional painkillers, such as certain antidepressants or antiseizure medicines, because they can calm nerve signals. Always discuss these options with your healthcare provider, as they will recommend what is safe and appropriate for you.

When is surgery considered?

If numbness is caused by a compressed nerve that does not improve with physical therapy, splints, or lifestyle changes, your doctor might suggest surgery. For example, carpal tunnel release surgery can reduce pressure on the nerve in the wrist, and spinal surgery can relieve pressure on a nerve root from a herniated disc. Surgery is usually a last resort.

Living with this condition

Living with numbness means being extra careful with parts of your body that have reduced feeling. Always use visual checks for your feet and hands to spot injuries you cannot feel. Choose shoes that fit well and have non-slip soles. Use tools with thick, cushioned handles. If you have balance issues from numbness in your feet, consider a walking aid to prevent falls.

Lifestyle tips

• Quit smoking and limit alcohol, as both can damage nerves and reduce blood flow.
• Keep your blood sugar levels in a healthy range if you have diabetes, with meals spread across the day.
• Maintain a healthy weight to reduce pressure on your spine and joints.
• Try stress-relieving activities like deep breathing, meditation, or gentle stretching, because stress can make pain and numbness feel worse.

Diet and exercise

A balanced diet rich in fruits, vegetables, whole grains, and lean proteins supports your nerves. Particularly important are B vitamins, including B12, folate, and B6, which help nerve health. If you are deficient, your doctor may recommend supplements. Regular, gentle exercise such as walking, swimming, or cycling improves circulation and helps keep your nerves and muscles healthy. Always check with your doctor before starting a new exercise routine.

Mental health and emotional wellbeing

Numbness can be worrying, especially when it is constant or unexplained. It can cause frustration, anxiety, or feelings of helplessness. It is normal to feel this way. Talking to your doctor about your concerns can help. If you notice lingering sadness or anxiety, consider speaking with a counsellor or psychologist – they can help you cope with chronic symptoms.

Prevention

Not all causes of numbness can be prevented, especially those linked to genetics or sudden injuries. But you can reduce your risk by managing chronic conditions, avoiding repetitive strain, protecting against injuries, staying active, and eating a nutrient-rich diet. If you have diabetes, keeping blood sugar under control is the most powerful way to prevent nerve damage.

Vaccines

Some infections that can cause nerve damage and numbness, such as shingles and Lyme disease, can be prevented or made less severe with vaccines. Ask your doctor or local health service which vaccinations are recommended for you based on your age and health.

Screening programmes

There is no routine public screening for numbness itself. However, regular check-ups for conditions like diabetes and high blood pressure can help you catch nerve damage early, before it causes lasting numbness. If you have a condition that increases your risk, your doctor may do regular neurological exams.

Complications

If left untreated

• Unnoticed injuries, burns, or cuts on numb body parts, because you cannot feel pain or temperature changes, which can lead to infections or poor wound healing
• Falls and fractures, especially if numbness affects your feet and affects your balance
• Muscle weakness or wasting if a compressed nerve is not treated
• Progression of an underlying condition, such as uncontrolled diabetes, which may cause more widespread nerve damage

Long-term outlook

The outlook depends on the cause. Many cases of numbness resolve after treating the underlying issue, such as correcting a vitamin deficiency or taking pressure off a nerve. People with chronic conditions like diabetes may have permanent numbness, but they can still lead full, active, independent lives by learning to work around it and by protecting affected areas. Early medical attention can often prevent further damage. With the right care and support, most people can manage numbness well.

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