<s>[INST] i had radiation therapy in july and august of this year for vocal chord cancer  6 weeks after com pletion my voice was almost back to normal   Since then it has been back downhill and sometimes it is almost impossible to speak    My throat doctor has checked me out and says everything is fine    no cancer and chords moving why would my voice get better and then steadily worse [/INST] HI THANKS FOR YOUR QUERY.THE ISSUE WHICH YOU ARE CURRENTLY EXPERIENCING IS SECONDARY EFFECTS DUE TO RADIATION THERAPY.RADIATION CAN DAMAGE THE NERVES SUPPLYING THE VOCAL CORDS AND OCCASIONALLY VOCAL CORDS TOO.THIS CAN IMPAIR THE QUALITY OF VOICE SERIOUSLY.AS YOUR DOCTOR HAS ASSURED YOU THAT NO NEW Tumor HAS DEVELOPED, THERE IS VERY LESS FOR YOU TO WORRY ABOUT.IT WILL TAKE MONTHS FOR THE VOICE TO RECOVER DEPENDING ON THE QUANTITY AND QUALITY OF RADIATION USED.HAVE REGULAR PERIODIC EXAMINATIONS OF THE THROAT.STAY IN TOUCH WITH YOUR DOCTOR.YOUR VOICE MAY IMPROVE BUT MAY NOT REACH ORIGINAL QUALITY AND TIMBER.THANK YOU </s>