Recently mom, age 72, has been ill. I took her in for a cat scan yesterday because it looks like gallbladder. Anyway, past year or so, I had been noticing a voice change to a higher pitch and less steady tone. Since she has been sick and weak, her voice has changed even more as described above, I was just wondering what causes the higher pitch, wavering voice. She is overweight, has high blood pressure, and heart arrhythmia, and high cholesterol issues.