Voice, loss of
Incapacity to speak normally. Temporary partial loss of voice frequently results from straining of the muscles of the larynx (voice box) through overuse of the voice or from inflammation of the vocal cords or laryngitis.
Consistent or recurrent loss of the voice can be the result of polyps on the vocal cords, thickening of the vocal cords in hypothyroidism (the under activity of the thyroid gland), or interference with the nerve supply to the larynx muscles as a result of cancer of the larynx , thyroid gland, or oesophagus. Complete loss of the voice is rare and is often of psychological origin.