Nearly everyone has experienced the feeling of "pins and needles" in a limb at some point. Perhaps you were kneeling on the floor and your legs fell asleep, or you woke up with a numb hand after spending the night with your arm positioned under your pillow. That tingling feeling is formally known as paresthesia. Paresthesia often occurs in the hands and feet, but it can also occur in other body parts, including in a tingling tongue.
The University of Rochester Medical Center explains that paresthesia is the result of a "traffic jam in your nervous system." Pressure on the nerve creates a blockage, preventing the electric impulses from traveling up and down the nerves. Once the pressure is removed, the impulses can travel freely again. After a delay, the impulses tend to travel more quickly than usual, causing a tingling sensation in the affected area.
The tingling you may one day feel in your tongue is rarely from falling asleep in a strange position, however. Here are a few things that can cause a tingling tongue.