The possible causes of inflexibility of the right side of the limbs include cerebral infarction, cerebral hemorrhage, intracranial tumors and so on. 1. Cerebral infarction: When cerebral infarction occurs on the left side of the brain due to cerebral artery stenosis, cardiogenic embolism, small artery occlusion, etc., it can be manifested as inflexibility of the right side of the limbs, which can be accompanied by crooked mouth, and it mostly starts when the disease is quiet. 2. Cerebral hemorrhage: due to long-term hypertension combined with small arteriosclerosis, cerebral arterial malformation, hypertension, etc., in emotional excitement or strenuous exercise, it can lead to cerebral vascular rupture and hemorrhage, which can cause brain function damage and lead to the symptom of inactivity of the right side of the limbs, and it can be accompanied by headache and impaired consciousness. 3. Intracranial tumor: When intracranial tumor produces compression symptoms, it can also lead to the appearance of the above symptoms, and most of them start slowly. The immobility of the right side of the hands and feet may also be caused by other reasons, which should be consulted in time to avoid delaying the condition.