Well I have been diagnosed with underactive thyroid since March 2013 and on levothyroxine 100 mg per day. I was sent to a specialist ( ENT) in February this year after having a hoarse voice and vocal problem for 4 months. Nothing bad was found just a little bruising left from what was thought to be a vocal " injury" since I have always been an enthusiastic and regular singer. The change in my vocal sound was very sudden one day last November.
I was advised by the consultant to find a vocal coach and so I did and have been getting some restorative therapy for the voice and advised it will take a long time to heal. I still get hoarse when I am talking / speaking for a long time and when singing I still experience a jarring sound on certain notes which I have never had prior to the " injury. I sometimes think there has been an improvement but sometimes feel it is never going to improve. I am wondering if anyone else has had the same experience whether a singer or not and whether this is linked to the thyroid problem or not - Noone has been able to confirm this to me.