Cycling hand numbness is considered to be caused by carpal tunnel syndrome, nerve root cervical spondylosis. 1. Carpal tunnel syndrome: commonly known as “mouse hand”, is the median nerve in the carpal tunnel suffered extrusion caused by a peripheral nerve compression syndrome. Exogenous compression, carpal tunnel becomes smaller, the lumen of the tube occupation, programmers, carpenters, cooks and other occupational factors can cause carpal tunnel syndrome. The main symptoms are anterior wrist pain and numbness and weakness of the hand, which are commonly found in the region of index and middle fingers. 2. Neurogenic cervical spondylosis: It is a common type of cervical spondylosis caused by degenerative changes of cervical vertebrae, and can exist in combination with other types of cervical spondylosis. When the cervical degenerative disc changes and other causes of cervical nerve root stimulation and (or) compression, can lead to neck, shoulder and back pain, upper limbs and fingers of the radioactive pain, numbness, weakness and other symptoms. Bicycling hand numbness may also be caused by chronic strain injury, etc. It is recommended to consult a doctor for a clear diagnosis and targeted treatment under the guidance of the doctor.