Pins and needles: Relieving that weird tingling sensation

Have you ever felt a tingling, prickling or numb sensation in your arm or leg, almost like tiny pins and needles poking at your skin? This common and often harmless feeling, known as paraesthesia, happens when pressure on a nerve temporarily cuts off blood supply. It's why you might experience that odd sensation after sitting in one position for too long or falling asleep with your arm tucked under your head.