Numbness By Michael C Levin, MD, College of Medicine, University of Saskatchewan Reviewed / Revised Aug 2021 | Modified Sep 2022 View Patient Education Pathophysiology Etiology Evaluation Treatment Key Points Topic Resources Spinal nerve Sensory dermatomes Some Causes of Numbness "Numbness" can be used by patients to describe various symptoms, including loss of sensation, abnormal sensations, and weakness or paralysis.