what is the cause of sudden increase high bp? i have test everything such as ecg , urine , sugar, creatanine, blood count etc......... .every thing is normal but creatanine in blood is little high such as 130 and hdl is too low such as 25. my bp increase sudden(150/90 or 160/95) after some walking or running or long time bus journey then fall to normal(130/80 , in morning 115/75) after resting one hour. In some time increase high bp without any cause and then fall. what is the problem? how can i do??? please help . my age 26