If you've ever noticed your legs becoming numb or aching on a flight, it could be down to a number of reasons. Sitting for a long time in cramped spaces leads to reduced blood circulation, causing muscles to become stiff and achy.

The "tingly" or "pins and needles" sensation in your legs after a flight is usually a result of prolonged immobility and poor circulation caused by the cramped conditions of an airplane cabin. When you sit for several hours in a confined space, the veins in your legs have a harder time pumping blood back up to your heart against gravity. This can lead to minor swelling (edema) and the compression of nerves, which creates that tingling or numb feeling. Furthermore, the low humidity and pressurized cabin environment can lead to dehydration, which thickens the blood and further impairs flow. In more serious cases, this sensation can be a warning sign of Deep Vein Thrombosis (DVT), where a blood clot forms in the deep veins of the leg. To prevent this, travel experts recommend wearing compression socks, staying hydrated, and performing "ankle pumps" or walking up and down the aisle every hour to keep the blood moving. While most "tingling" is harmless and fades shortly after you start walking again, any persistent pain, redness, or significant swelling should be evaluated by a medical professional immediately upon landing.