Skip to main content
You have permission to edit this article.
Hands or feet asleep? Here's what to know

Hands or feet asleep? Here's what to know

  • Updated

In general, numbness, tingling and other symptoms called paresthesia are most commonly due to abnormal nerve function.

We’ve all been there. You awaken in the morning, and one of your hands is completely numb. It feels dead, heavy and simply won’t work. Perhaps there’s some tingling as well.

Or you arise from a long dinner or movie, and one of your legs feels that way. Then over a few minutes — maybe you shook your hands, stamped your foot — everything goes back to normal. Until the next time.

The first time this happened, it might have been worrisome. Now that you know it’s temporary and happens to everyone, it may not bother you. But did you ever wonder why in the world this happens? Read on!

When the nerves are not happy

When someone complains to me about a hand or leg falling asleep, I reassure the person. I usually explain, “The nerves are not happy.”

In general, numbness, tingling and other symptoms called paresthesia are most commonly due to abnormal nerve function. And when this is intermittent, temporary and related to holding one position for a long time, it’s rarely anything to worry about.

The cause in these cases is simply pressure on one or more nerves traveling into the hands or feet. When you remove the pressure (by changing position, for example), the problem goes away.

However, many other causes of nerve problems — more than 100, in fact — can cause similar, though more prolonged and persistent, symptoms, as noted below. If you have one of these conditions, you’re far from alone: An estimated 20 million people have a form of peripheral neuropathy that might make hands or feet numb or tingly.

A word on nerve terminology

So, what is peripheral neuropathy? It’s worth clarifying some commonly used medical terms.

  • Neuropathy means nerve disease.
  • Peripheral neuropathy is a condition affecting nerves in the peripheral nervous system, which includes nerves outside of the brain and spinal cord. Nerves of the legs and arms are part of the peripheral nervous system and tend to be the first ones affected by diseases of peripheral nerves.
  • Compression (or entrapment) neuropathy develops because of pressure on a nerve. Carpal tunnel syndrome, which occurs when a nerve becomes compressed in an already tight channel in the wrist, is one well-known example. Having your hand or foot fall asleep is another. Fortunately, this is quite temporary, while carpal tunnel syndrome is often chronic.
  • Paresthesia is a sensation of pins and needles, numbness, or another abnormal sensation, often tied to peripheral neuropathy. Having your hand or foot fall asleep is a temporary paresthesia.

When to see your doctor

If your hands or feet fall asleep occasionally and normal sensation quickly returns, that’s fine. No need to contact your doctor.

But call your doctor promptly if you have persistent numbness, tingling, or other unusual sensations in your hands or feet. This is especially important if these sensations cause trouble with walking or holding onto things. Your doctor should investigate further and will likely consider possible causes of peripheral neuropathy, including the following:

  • Diabetes is the most common identifiable cause of peripheral neuropathy, accounting for nearly a third of cases. Sometimes it’s the first indication that a person has diabetes.
  • Diseases of the liver, kidney, and thyroid.
  • Nutritional deficits, such as vitamin B12 deficiency or other vitamin deficiencies. Vitamin B6 is unique in this regard because too little or too much can cause neuropathy; too little is quite rare, but it’s possible to get excess B6 from supplements.
  • Alcohol and other toxins. Alcohol ingestion is probably the most common cause of toxic neuropathy. Alcoholics may also have nutritional deficiencies that can cause neuropathy.
  • Certain medications, including some antibiotics and chemotherapy drugs, or lead, mercury, and other chemical and industrial toxins, may be culprits.
  • Vascular disease, which occurs when the blood supply to a peripheral nerve is impaired, as with atherosclerosis. The nerve becomes unhealthy or dies.

Additional causes of neuropathy are infection, compression or trauma to nerves, and inflammatory or autoimmune conditions that affect nerves. It’s worth noting that nearly a third of cases have no clear cause — a problem known as idiopathic neuropathy.

The bottom line

The causes of peripheral neuropathy are many and range from the harmless and annoying to the intolerable and dangerous. When in doubt, see your doctor. But try not to worry when your hands or feet fall asleep due to holding your arms or legs too long in one position, as long as this resolves within minutes and doesn’t happen often. These things happen.

And the next time you see a movie, don’t forget to change positions, stretch, and fidget a bit — even if the movie is really good.

(Robert H. Shmerling, M.D., is a senior faculty editor at Harvard Health Publishing.)

You must be logged in to react.
Click any reaction to login.

Build your health & fitness knowledge

* I understand and agree that registration on or use of this site constitutes agreement to its user agreement and privacy policy.

Related to this story

Most Popular

  • Updated

The death of Supreme Court Justice Ruth Bader Ginsburg is giving new life to the latest constitutional challenge to the Affordable Care Act. It also places anti-abortion activists on the cusp of a court majority large enough to ensure the rollback of the right to abortion and, possibly, some types of birth control. Meanwhile, Health and Human Services Secretary Alex Azar tries to centralize power at the sprawling department plagued by miscommunications and scandals. Anna Edney of Bloomberg News, Kimberly Leonard of Business Insider and Mary Ellen McIntire of CQ Roll Call join KHN’s Julie Rovner to discuss these issues and more. Plus, Rovner interviews KHN’s Sarah Jane Tribble about her new podcast, “Where It Hurts,” debuting Sept. 29.

KHN and California Healthline staff made the rounds on national and local media this week to discuss their stories. Here’s a collection of their appearances.

COVID-19 lockdowns resulted in better air quality due to decreased commercial activity and automobile traffic. The lifting of lockdowns and a recent surge of wildfires in Western and Mountain states has quickly reversed this trend.

Get up-to-the-minute news sent straight to your device.


News Alert

Breaking News