Dear Ma m Thanks for writing to HCM. The fluctuation in BP are physiologically alterations in level of mental or physical stress. Any neurological affliction, alcohol use, pheochromocytoma are other theoretical possibilities. I would like you to concentrate on the local conditions first. blood pressure taken after exercise, a walk, after tea/coffee/smoking, during pain or psychological stress, during any kind of hunger or anxiety will be higher than normal. Do get your instrument checked. If still there are large fluctuations , do see your internist. Sincerely Sukhvinder