Why does squatting for a long time make your feet numb?

Usually, this happens when pressure is applied to a part of the thigh or arm. If the artery is squeezed, it can't provide tissues and nerves with oxygen and glucose necessary for normal operation. Nerve bundles will also be blocked, and electrochemical pulses cannot be transmitted to the brain normally. Some nerves stop working, while others are extremely active. These signals are transmitted to the brain and converted into burning and stinging sensations. It is these abnormal feelings of the skin that remind you to move your limbs. Shake your feet, you can release the pressure, let the nutrient-rich arterial blood flow back to this part, and the neurons can start working normally. The tingling sensation will not disappear until the work of neurons completely returns to normal. That's why you feel pain when you try to "wake up" a numb limb.

Thank you for reading my answer carefully. If my answer is helpful to you, please adopt and evaluate originality and solvability.