Ever woken up with a numb arm after sleeping on it? Or sat cross-legged for so long that your feet started feeling like they were covered in tiny ants?
Most of us have experienced that familiar semut-semut sensation at some point. Usually, it disappears after we move around. But what happens when the numbness keeps coming back, lasts longer than usual or starts affecting your everyday activities?
Numbness can be your body’s way of telling you that something is affecting your nerves. While it isn’t always a cause for concern, understanding why it happens can help you recognise when it’s time to seek professional advice.
Numbness is a reduction or loss of feeling in part of your body. You might notice it in your fingers, hands, feet, arms or legs.
However, not everyone experiences numbness in the same way. Some people describe it as a loss of sensation, while others experience tingling, burning or a strange crawling feeling beneath their skin.
Your nerves act like an extensive communication network, carrying messages between your brain, spinal cord and the rest of your body. They allow you to feel touch, temperature and pain while also helping control your movements.
When these signals are interrupted or the nerves become irritated or damaged, you may experience numbness or other unusual sensations.
There are several possible explanations, ranging from something as simple as sitting in one position for too long to medical conditions that require treatment.
Here are some of the more common causes.
Have you noticed your fingers tingling after a long day at your computer?
Sometimes, pressure on a nerve can interrupt normal sensation. One example is carpal tunnel syndrome, where the median nerve becomes compressed as it passes through your wrist.
This can cause numbness or tingling in your thumb, index finger, middle finger and part of your ring finger. Symptoms are often more noticeable at night.
If your numbness travels down your arm or leg, the problem may originate from your spine.
A slipped disc, for example, can irritate or compress a nearby spinal nerve. Depending on which nerve is affected, you may experience tingling, shooting pain, numbness or muscle weakness.
Numbness travelling from your lower back into your leg may be associated with sciatica, while nerve compression in your neck can cause symptoms extending into your arm or hand.
Diabetes can sometimes damage the nerves, particularly when blood sugar levels remain elevated over time. This condition is called diabetic peripheral neuropathy.
It commonly begins in the feet, causing tingling, burning or reduced sensation. Some people may not notice minor injuries because they can no longer feel their feet as well as they used to.
If you have diabetes and notice these symptoms, speak to your doctor. Early assessment and appropriate management are important.
Numbness can also be associated with vitamin B12 deficiency, thyroid disorders, multiple sclerosis and certain medications.
A stroke can cause sudden numbness, particularly on one side of the body. Unlike gradual or recurring tingling, sudden numbness may require emergency medical attention.
The important thing to understand is that not all numbness is caused by a trapped nerve. Identifying the underlying cause is essential to choosing the right treatment.
If your foot feels numb after sitting cross-legged and the sensation disappears when you stand up, it’s usually nothing serious.
However, numbness that keeps returning, gradually worsens or interferes with your everyday activities deserves further attention.
Seek emergency medical attention if you experience sudden numbness, especially alongside facial drooping, weakness on one side of your body, difficulty speaking or sudden vision changes. These may be signs of a stroke.
Numbness around your groin, new bladder or bowel problems, or rapidly worsening leg weakness can also indicate serious spinal nerve compression.
In Malaysia, call 999 for a suspected medical emergency.
If your symptoms aren’t sudden but persist or repeatedly return, arrange an assessment with a healthcare professional.
It depends on what’s causing it.
For certain conditions, such as nerve compression in the neck, lower back or wrist, physiotherapy can help manage symptoms and improve your ability to move comfortably.
At Ropheka Physiotherapy & Sports Injury Centre in Seremban, we begin by listening to your concerns. Where do you feel the numbness? When did it start? Does it worsen when you’re sitting, walking or sleeping? Is it accompanied by pain or weakness?
These details, together with an appropriate physical assessment, help us understand what might be contributing to your symptoms.
Depending on your condition, your rehabilitation may involve exercises to improve mobility and strength, nerve-gliding exercises, advice on modifying activities that aggravate your symptoms, or a gradual return to your usual routine.
For patients recovering from stroke or other neurological conditions, physiotherapy may also focus on improving balance, coordination, strength and independence.
Some causes of numbness require medical investigations or treatment beyond physiotherapy. Where appropriate, we will recommend further medical assessment.
While waiting for an assessment, pay attention to when and where your symptoms occur. For example, do your fingers become numb while driving? Does tingling develop in your feet after prolonged sitting? Does changing position make a difference?
Avoid remaining in one position for extended periods, and take regular movement breaks throughout the day.
If you have reduced sensation, be careful with hot surfaces and sharp objects, as you may not notice an injury immediately.
Most importantly, don’t try to stretch or exercise your way through persistent numbness without understanding its cause.
Why do my hands become numb when I sleep?
Sleeping with your wrists bent or putting pressure on your arms can temporarily compress nerves. If the numbness frequently wakes you at night, conditions such as carpal tunnel syndrome may be contributing.
Can stress cause numbness or tingling?
Anxiety and rapid breathing can sometimes cause tingling, particularly around the mouth, fingers or hands. However, recurring numbness shouldn’t automatically be attributed to stress without considering other possible causes.
Is numbness always a sign of nerve damage?
No. Temporary pressure on a nerve can cause numbness without permanent damage. However, persistent symptoms may indicate nerve irritation, compression or an underlying medical condition.
Will numbness go away on its own?
Sometimes. Temporary numbness often disappears once pressure on a nerve is relieved. Other causes may require medication, physiotherapy or further medical treatment.
It’s easy to dismiss occasional tingling or numbness, especially when you’re busy with work, family and everyday responsibilities. But when these symptoms become a regular occurrence, it’s worth finding out why.
At Ropheka Physiotherapy & Sports Injury Centre, we’ve been caring for the Seremban community since 1988. Our physiotherapists provide personalised rehabilitation for musculoskeletal and neurological conditions, helping patients improve their movement, strength and quality of life.
If you’ve been experiencing persistent numbness or tingling, get in touch with our team to arrange an assessment. We’ll help you understand your symptoms and determine the appropriate next steps.
