Numbness can have a variety of causes. Most are harmless, but some can be life-threatening.

Call 911 or seek emergency help

Go to a hospital emergency room or call 911 or your local emergency number if your numbness:

• Begins suddenly.
• Follows a recent head injury.
• Involves an entire arm or leg.

Also seek emergency medical care if your numbness happens with:

• Weakness or paralysis.
• Confusion.
• Trouble talking.
• Dizziness.
• A sudden, bad headache.

You are likely to have a CT scan or MRI if:

• You've had a head injury.
• Your doctor suspects or needs to rule out a brain tumor or stroke.

Schedule a doctor’s visit

See a healthcare professional if your numbness:

• Begins or worsens gradually.
• Affects both sides of the body.
• Comes and goes.
• Seems related to specific tasks or activities, particularly repetitive motions.
• Affects only a part of a limb, such as your toes or fingers.