Understanding Nerve Compression

What causes paresthesia from compression?

Paresthesia from compression, commonly known as “pins and needles” or a tingling sensation, is caused by pressure on the nerves in the affected area. When external pressure is applied to a part of the body, such as sitting or lying in a certain position for an extended period, it can impede the normal functioning of nerves.

Compression on the nerve fibers disrupts the normal transmission of signals between the nerves and the brain. Nerve fibers are responsible for transmitting sensory information, including touch, temperature, and pain, from different parts of the body to the brain. When these nerves are compressed, the signals can become distorted or weakened.

The compression of nerves increases the pressure within them, affecting their blood supply and restricting the normal flow of nutrients and oxygen. This lack of blood flow and oxygen can lead to temporary damage or irritation of the nerves. Additionally, compressing the nerves can cause inflammation and the release of chemicals that produce the tingling or “pins and needles” sensation.

Once the pressure is removed, such as by changing position or releasing the compression, the blood flow to the nerves is restored, and they can regain normal function. This is why the tingling sensation often subsides quickly after alleviating the compression.

It’s important to note that paresthesia from compression is usually temporary and subsides once the pressure is relieved. However, in some cases, if the compression persists or if there is underlying nerve damage, the paresthesia may persist or become chronic. If you experience prolonged or recurring paresthesia, it is advisable to consult a healthcare professional for a thorough evaluation.

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