How do habitual and psychogenic dysphonia differ?

In the context of medicine, dysphonia refers to a defective use of the voice. When no visible laryngeal cause is present, these conditions are classified as nonorganic or functional voice disorders, which are primarily distinguished by their underlying origins.12

The two main types of these functional disorders differ as follows:

• Habitual Dysphonia: This type arises specifically from faulty speaking habits. Over time, such vocal abuse can lead to secondary structural changes, such as the development of nodules or polyps on the vocal cords.23
• Psychogenic Dysphonia: This type stems from emotional causes. It occurs because emotional distress interferes with voluntary vocal function, leading to either excessive or depressed physiological activity.2

Both habitual and psychogenic dysphonias can manifest in two basic subtypes based on physiological activity: hyperkinetic (overactive), characterized by excessive muscular action and a harsh, constricted voice, or hypokinetic (underactive), characterized by a sluggish, open larynx that results in a breathy, hushed vocal quality.2