Biker's palsy occurs as a result of a firm grip on bicycle handlebars for hours to days and longer. There are two nerves affected most often: ulnar and median. Both these nerves pass through the wrist to the hand.

Prolonged pressure can cause numbness, tingling, and weakness. Nerve involvement of this kind is called neuropathy.

A similar problem can occur in motorcylists as well as anyone handling high-power tools that vibrate like a jackhammer.