Suddenly walking unsteadily, to one side, and then normal after a while may be caused by transient cerebral ischemia, vestibular dysfunction and other reasons. 1. Transient cerebral ischemia: transient ischemia of cerebral tissues caused by cerebrovascular microthrombus embolism, transient hypotension, cerebral vasospasm and other factors, which results in transient dysfunction of brain cells and the emergence of this symptom. 2. Vestibular dysfunction: damage to vestibular blood vessels, nerves, cochlea and other parts of the ear leads to vestibular dysfunction, and this symptom appears. If you experience unsteady walking, it is recommended that you consult a doctor to determine the cause of the problem and get targeted treatment.