Functional dysphonia refers to dysphonia in a patient without any organic or neural disease. Psychogenic aphonia, phonasthenia, voice tremors, hyperfunctional dysphonia and mutational dysphonia are classified into the category of functional dysphonia. Conducting a medical interview is very important for obtaining a correct diagnosis, and it is necessary to consider the findings of fiberscopic images and voice and respiratory function tests from various viewpoints. The first choice of medical treatment is voice training, and close cooperation with a speech therapist is required.
