The sensation of pins-and-needles or foot tingling that you occasionally feel is quite normal. This is usually caused due to being in the same position for a long time: when you sleep in an awkward position or keep your legs crossed for a long time, the blood circulation slows down leading to a temporary tingling in hands or feet. This temporary sensation goes away when you move and stretch the affected parts. However, if the tingling sensation occurs frequently or lasts for a long time, you need to consult a doctor immediately.
To diagnose the causes of tingling feet and hands, a doctor may suggest blood tests, electromyogram (EMG), CT scan or an MRI. The test results will reveal whether the causes of tingling are benign or symptoms of something more serious. Here are some of the common causes of tingling feet and hands: