Hi..thanks for writing us Paralysis or Stroke may result from either bursting of blood vessels in brain resulting in hemorrhage or occlusion of blood vessel site resulting in ischemic stroke.. Symptoms depend upon site of blockade or bleed, that may be weakness in half of body, numbness,deviation of mouth, slurring of speech, giddiness, vomitting etc. common causes for stroke are hypertension, diabetes, increase cholesterol, smoking, connective tissue disease, old age, blood clotting disorder I think you are satisfied by my answer