Information for Patients
Sensory symptoms of numbness or tingling are a common experience. When they occur, for example, when sitting cross-legged or sleeping on an arm, they can be regarded as a normal physiological phenomenon.
Some nerves are more sensitive to pressure than others and at the wrist a narrow carpal tunnel through which the median nerve passes may be the cause of sensory symptoms in the hand. The ulnar nerve at the elbow lies in a relatively superficial groove and similarly trauma in this area can also be a cause of ulnar nerve symptoms affecting the little and ring finger and the hand.