Thumb joint numbness during elliptical exercise may be caused by local compression, carpal tunnel syndrome, blood circulation disorders, cervical spondylosis and other reasons. 1. Local compression: due to the movement on the elliptical machine, the wrist grasping force is too large, squeezing the epidermal nerves, the symptoms of numbness of the thumb joints can occur, change the posture of the proper rest can be relieved, is a normal physiological phenomenon. 2. Carpal Tunnel Syndrome: Carpal Tunnel Syndrome patients due to the pulling of the corresponding tissues during exercise, nerve compression symptoms increase, numbness of the thumb joint can occur, accompanied by wrist pain, weakness and other symptoms. 3. Blood circulation disorders: commonly found in patients with vascular diseases of the upper limbs, due to the sclerosis, stenosis and plaque of the arteries of the upper limbs and other lesions, resulting in blood circulation disorders, which can cause numbness of the thumb joint. 4. Cervical spondylosis: due to the cervical disc protrusion backward compression of the nerves innervating the upper limbs, the patient in the movement, nerve compression symptoms aggravate, can appear thumb joint numbness, accompanied by neck and back pain and pain in the upper limbs on the same side. Elliptical machine is a common fitness equipment, exercise thumb joint numbness may also have other reasons, such as central nervous system diseases, etc., it is recommended that the patient timely hospital consultation, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.