dear sir i have hypertension problem since 1.5 year. sometimes it reaches to 180/120. permanantly it is 140/90. i m taking carvidelol for treatment. all my test for hypertension are clear like t3 t4 tsh, abd ultra sound, blood urea, creatnin and electrolytes all r normal.then what will be the cause of hypertension? my body weight is 61kg and i m 26 years old.