The term "pinched nerve" describes one type of damage or injury to a nerve or a set of nerves. The injury may result from compression, constriction, or stretching. Symptoms include numbness, pins and needles or a burning sensation, and pain radiating outward from the injured area. One of the most common examples of a single compressed nerve is the feeling of having a foot or a hand "fall asleep." Pinched nerves can sometimes lead to other conditions such as peripheral neuropathy, carpal tunnel syndrome, and tennis elbow. The extent of such injuries may vary from minor, temporary damage to a more permanent condition. Early diagnosis is important to prevent further damage or complications. A pinched nerve is a common cause of on-the-job injury.
This answer is based on source information from the National Institute of Neurological Disorders and Stroke.