Why Do Unpleasant Tingling Sensations Occur in a Leg After Sitting Too Long?
Tingling sensations in the legs often arise after remaining in an uncomfortable position for an extended period. We consulted a medical expert to understand the causes behind these prickling feelings and their significance for the body.
We spoke with a healthcare professional to uncover the reasons behind tingling sensations and their role in the body.
Olga Shemyatovskaya
Certified neurologist and health blogger.
The human body is an incredibly intricate system that requires precise and wise regulation to function effectively. Every part of our body is monitored by the brain, with neurons (nerve cells) playing a vital role in this process. The extensions of neurons form nerves, which serve two primary functions:
- Transmitting information from all organs and body parts to the brain.
- Conveying commands from the brain to the body.
When you remain in an awkward position for a prolonged time—such as sitting on your leg—this connection between your leg and brain temporarily weakens. This happens because the nerves and blood vessels supplying oxygen and glucose to all tissues in the leg, including the nerves themselves, become compressed. And that’s when the sensation begins.
The brain sends a signal: “Hey, what’s happening with the leg?” but the communication is disrupted. The neurons think: “We can’t hear the brain… It seems oxygen is low. Alert! Alert!” and start firing random signals.
The brain interprets this as interference but senses something is wrong: “Connection issues, but the leg seems to be lacking something. Leg, numb! Wait, no! Leg, feel cold! Activate tingling sensations! What on earth is going on?”
At this point, people usually experience discomfort and adjust their posture. Once the pressure is relieved, circulation resumes, the brain reestablishes connection with peripheral neurons, and the tingling sensations fade within minutes.
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