The clinical symptoms of numbness in one limb are caused by the following: 1. lacunar cerebral infarction, a common type of cerebral infarction, with mild clinical symptoms, such as dizziness, headache, and numbness in the limbs. The diagnosis can be confirmed by checking the head CT. 2. Cervical spine disease, a degenerative change of the cervical spine, is related to long-term sedentary and lack of exercise, and the common clinical symptoms include dizziness, neck discomfort and shoulder soreness. The protruding intervertebral disc compressing the nerve of the arm can cause numbness and other uncomfortable symptoms of the limb, which can be confirmed by checking the cervical spine MRI. 3. Lipid abnormalities, which cause symptoms of numbness of the limb, are caused by insufficient blood supply to the end of the limb. Lipid abnormalities affect the blood circulation at the end of the limb, and may cause acute cerebral infarction, you can check the blood lipids to confirm the diagnosis, usually appropriate exercise and a light diet.