Hello, Thanks for writing to Health Care Magic, I am Dr Asad Riaz, I have closely read your question and I understand your concerns, I will hereby guide you regarding your health related problem. sundenly rise bp from sitting to standnd condition is called orthostatic hypertension in which systolic bp increase more than 20 mmhg than resting..it can be due to autonomic system problem,pheocromcytoma,DM etc..if u were my pateint i owuld like to take detail histroy that u have other features like headache or palpitaion that point toward pheochromocytoma,dry mouth or excessive urination pointing towards DM n do detail exam n then run some tests like fastng blood sugars,urinary metanehprine n VMA n then after findng the cause will treat u accordngly..beta blockers can be used for hypertension n will tx underlying cause if it is there bcs in case of essential hyperstension no cause is present I hope this answered your question, if you have more feel free to ask. Regards. Dr.Asad Riaz. General and Family Physician.