Numbness and swelling of the right hand may be caused by peripheral nerve compression, cervical spondylosis, diabetes mellitus, stroke and other reasons. 1. Peripheral nerve entrapment: When the nerve pathway along the peripheral nerves to the right hand is entrapped or irritated, numbness and swelling of the right hand may occur. Common examples include carpal tunnel syndrome, elbow tunnel syndrome, tendon sheath cysts, and stenosing tenosynovitis. 2. Cervical spondylosis: cervical spondylosis is due to degenerative diseases of the cervical spine, resulting in the rupture of the fibrous ring, the nucleus pulposus protrudes to the back, resulting in spinal cord compression, such as cervical spine 5-7 nerve root involvement, may radiate to the right upper limb, numbness, distension and pain in the right hand, or even weakness. 3 Diabetes, stroke: diabetes affects the whole body’s sugar metabolism, peripheral nerve and microvascular lesions, which may also lead to the symptoms of right hand numbness and swelling; stroke affects the blood supply to the central nervous system of the brain, and there are abnormal sensations in the cerebral cortex, which may also lead to numbness and swelling of the right hand. Sometimes the cause of right hand numbness cannot be accurately determined by the right hand numbness alone, but also need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of the doctor and targeted treatment.