If the numbness of the right hand while sleeping is caused by cold, it should be kept warm; if it is induced by cervical spondylosis, cerebrovascular disease, etc., it should be treated promptly by a doctor. 1. Cold: If you sleep in a cold environment or do not do a good job of keeping warm, it will lead to arm cold, easy to appear right hand numbness. At this time, you should pay attention to keep warm, but also through the hot massage to promote blood circulation, relieve the discomfort symptoms. 2. Improper sleeping posture: If you have the habit of sleeping with your right hand pressed under your head, then the right hand numbness is mostly caused by improper sleeping posture. At this time, you should adjust the sleeping position, the symptoms can disappear. 3. Cervical spondylosis: If you have serious cervical spondylosis, it may compress the nerves and cause numbness of the right hand. At this time, you should rest more, avoid too high a pillow, when the symptoms are serious, you should consult a doctor in time, and follow the doctor’s instructions through cervical traction, physical therapy, or surgical treatment to improve the symptoms of numbness in the hand. 4. Cerebrovascular disease: when suffering from cerebrovascular disease, the symptoms of numbness of the right hand may also occur, common diseases such as cerebral infarction. At this time, you should seek medical treatment as soon as possible, and choose the appropriate treatment plan according to the specific condition, such as thrombolytic therapy, including drug thrombolysis or mechanical thrombolysis, antiplatelet therapy, blood pressure management, lipid management, etc. As you can see, there are more reasons for the numbness of the right hand when sleeping, if the symptoms have not been relieved or serious, you should consult a doctor to find out the cause, and then under the guidance of the doctor for treatment.