Numbness of the foot or feet is an abnormal sensation caused by an alteration in sensory nerve function in the foot.
Numb foot, numbness in feet, tingling feet, parasthesia of feet.
Sensations are carried from the extremities of the body to the brain via neurons in the spinal cord. If the blood supply to the nerves is decreased, it can produce the feeling that "my foot fell asleep". If the blood loss is permanent or severe, it is called ischemia and can result in permanent nerve damage. Nerves in the fingers feet can be damaged when the blood supply is decreased over time, as in diabetes.