Lying down to sleep on the right hand numbness wake up on the common causes of poor posture leading to hand compression, cervical spondylosis, carpal tunnel syndrome and so on. 1. Poor posture leading to hand compression: sleeping in poor posture, such as the arm for a long time under the body, will lead to poor local blood circulation, nerve nutrient supply is insufficient, hand numbness performance, lift the compression, blood supply recovery, numbness symptoms improve. 2. Cervical spondylosis: patients with cervical spondylosis due to high headrests, resulting in disc protrusion, compression of the nerve, the performance of the right hand numbness, get up and change the posture, can lift the compression of the nerve, and gradually return to normal. 3. Carpal tunnel syndrome: the carpal tunnel is rich in nerves, blood vessels, when sleeping pressure on the carpal tunnel, will lead to insufficient blood supply in the carpal tunnel, nerve compression, lying down to sleep on the right hand numbness wake up on the symptoms. There are other causes of numbness in the right hand when sleeping on the floor, such as peripheral neuropathy, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.