The causes of numbness of fingertips when lifting heavy objects include physiological factors, carpal tunnel syndrome, cervical spondylosis and so on. 1. Physiological factors: when lifting heavy objects when the hand due to the pressure of heavy objects, local blood circulation obstacles lead to ischemia and hypoxia, manifested as numbness of the fingertips. When the weight is put down, the blood flow will return to normal, and the numbness will disappear. 2. Carpal Tunnel Syndrome: Carpal Tunnel Syndrome patients lifting heavy objects due to the continuous force of the wrist, can aggravate the wrist nerve compression symptoms, manifested as numbness of the fingertips accompanied by wrist pain and so on. 3. Cervical spondylosis: lifting heavy objects can lead to neck stress, aggravating the symptoms of the protruding intervertebral disc compression of the nerve, resulting in numbness of the fingertips. Lifting heavy objects after the persistence of numbness of the fingertips does not exclude and disease-related, should go to the hospital in time to consult, clear reasons, targeted treatment.