Hi Ellen, I am Doctor Mbong. High blood pressure often complicates with stroke (or in less severe cases a Transient Ischemic Attack, TIA), which is due to death of nerve cells in the brain because compared to other body cells nerve cells are very sensitive to increased blood pressure. This more likely in patients with hyperthyroidism and thsoe not on any blood pressure control medication or in the face of stress or anxiety. So what happened to you was a reaction of your central nervous system cells (which control movement all over the body) to the rise in your blood pressure. You are lucky it didnt end as a stroke (a permanent movement or sensory deficit of the body which can even affect speech or vision). Please do see your physician, report this to him and get a brain scan done to make sure your brain cells are still ok. if you are not on medication please, ask for one from your physician and please take them regularly. Anything you have noticed that raises your blood pressure or the symptoms ( spells ) you described should be avoided. Added to medication, relaxation sessions, diets rich in vegetables and fruits as well as low salt, low fat, low cholesterol and low sugar diet and physical exercise will help. I wish you well and the best, Dr Mbong