What Are the Different Types of Numbness?

Carpal tunnel syndrome, common in web programmers and other computer users, can cause numbness in the hands.
Poor circulation may cause numbness and tingling in the legs.
Knee numbness is easily treated in most cases.
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  • Written By: Geisha A. Legazpi
  • Edited By: Allegra J. Lingo
  • Last Modified Date: 20 September 2014
  • Copyright Protected:
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Numbness is an abnormality in sensory function characterized by diminished or absent sensation. It is usually caused by compression or irritation of a peripheral nerve in the body. The location of the branch of the affected nerve usually determines the site of numbness. It can also be the basis for classifying the numbness type. The different types include finger, hand, foot, arm, leg, thigh, and facial numbness.

An abnormality in sensory symptoms can be a positive or a negative phenomenon. Numbness is a term used to denote a negative phenomenon, while paresthesia and dysesthesia are the general terms used to denote a positive phenomenon. Demonstration of numbness upon physical examination indicates that there is damage in at least half of the structure of the peripheral nerve innervating a site or region. Paresthesia refers to tingling or pins-and-needles sensation, whereas dysesthesia generally refers to all types of abnormal sensations whether a stimulus is present or not. Positive phenomena result from an excessive activity in the peripheral or central sensory pathway, and these are not necessarily associated with loss of sensation.

Primary sensation components include pain, thermal sensation, touch, vibration, and joint position. Other terms used for specific sensory abnormalities with negative phenomena are hypesthesia, anesthesia, and hypalgesia or analgesia. Hypesthesia refers to the reduction of pressure, light touch, and warm or cold temperature. Anesthesia refers to the absence of pressure, light touch, warm or cold temperature, and pinprick cutaneous sensation. Hypalgesia or analgesia refers to the reduced or absence of pain perception.

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A lot of nerves innervate different parts of the body. Compression or irritation of a branch of a nerve innervating the hands may cause hand numbness. The same is true with the branch of a nerve innervating other regions of the body.

This condition is generally harmless, but it may occasionally be life threatening. It can be caused by injury to the nerve by trauma, infection, or pressure from tumors or enlarged blood vessels, as well as by certain medications, radiation therapy, and lack of vitamin B12. Medical conditions that cause numbness include diabetes mellitus, multiple sclerosis, carpal tunnel syndrome, migraines, seizures, and stroke. What is important for an individual with this condition is to know when to consult a doctor. If it begins suddenly, involves an entire upper or lower extremity, follows a recent head trauma, or is accompanied with weakness, paralysis, confusion, dizziness, difficulty in talking, sudden or severe headaches, medical care should be sought immediately.

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anon345889
Post 4

I'm having numbness on the left side of my body and it gets into the right side after. I had seizures at the age of 20 but now at 34, I'm off my medication and the numbness is getting worse, but I don't know what to eat when the numbness happens. It is really annoying to me because I want to be normal, eating the right portions and getting stronger in all ways.

ddljohn
Post 3

My dad has been having paresthesia since a stroke last fall. Has anyone else experienced this? Will it ever go away?

burcidi
Post 2

@alisha-- What you have is a complex migraine. There are also sub-categories depending on your symptoms. I, for example, have hemiplegic migraines that cause numbness in my fingers, arms and face.

I think the type of numbness that we both experience is anesthesia. I can move my arm and face, I just can't feel anything when I touch them.

I'm not sure what the cause of the migraine and numbness is in your case but hemiplegic migraines are genetic. My body doesn't produce a protein that's required for nerve function and health. This is what brings on the migraines, followed by numbness.

You need to see a doctor if these persist so that you can get a diagnosis. There are some treatments like nitroglycerin that help with the symptoms.

discographer
Post 1

How is the numbness associated with migraines categorized?

I know about paresthesia, as I used to experience it all the time when my back hernia was in the most painful phase. I would experience numbness and tingling sensations down my left thigh and leg. My upper leg would feel totally numb one moment and tingly the next. I haven't experienced paresthesia for a long time now thankfully.

What I have been experiencing is numbness from migraines. I get a migraine several times a week and it lasts for hours, sometimes two days straight. A few hours into the migraine, I start experiencing numbness on my face.

What is the cause of this? Is it a sign that something is seriously wrong?

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