There are many reasons for right foot weakness and unsteady walking, such as acute cerebrovascular disease, spinal cord cervical spondylosis, intracranial tumor, lumbar intervertebral disc herniation and so on. 1. Acute cerebrovascular disease: acute cerebral hemorrhage, acute cerebral infarction, etc., can cause central motor function injury, so the right foot weakness and unsteady walking will occur. 2. Spinal cord cervical spondylosis: spinal cord cervical spondylosis can cause the phenomenon of unsteady walking with weakness of the right foot, and due to the compression of the spinal cord, motor, sensory and reflex disorders can occur, especially the decrease of muscle strength of the lower limbs. 3. Intracranial tumors: Intracranial tumors grow to a certain extent, which may damage the motor center, thus leading to the phenomenon of right foot weakness and unsteady walking. 4. Lumbar disc herniation: Lumbar disc herniation is mainly due to the nucleus pulposus prolapsing and compressing to the right nerve root, which will lead to the phenomenon of unsteady walking and numbness of the lower limbs. There are many reasons why the right foot is weak and unsteady, and it is recommended to go to the hospital after the symptoms appear, and take standardized treatment according to the doctor’s instructions after clarifying the cause of the disease.