The common causes of numbness in the right palm are as follows: a. Patients with right upper extremity arterial stenosis or obstruction will have symptoms of insufficient blood supply and oxygen supply to the right palm, and the patient will show symptoms of numbness in the right palm, which can be clearly diagnosed by performing right upper extremity arterial ultrasound. Patients with tenosynovitis of the right hand will also have symptoms of numbness in the palm of the right hand and pain when moving the palm of the right hand. When the intracranial tumor compresses the sensory nerve center of the right upper limb, the patient will show numbness in the palm of the right hand, and CT or MRI of the head can make a clear diagnosis. When the sensory center of the right palm has cerebrovascular rupture and bleeding, which affects the sensory nerve function of the right palm, the patient will have numbness of the right palm.