The commonest cause of dysphonia (change in voice) is viral or bacterial infection of the voice-box (larynx) that is referred to as laryngitis. Dysphonia caused by laryngitis should settle in 2 weeks. A change in voice that does improve within 2 weeks needs to be seen by an ENT surgeon, preferably at a voice clinic.

A voice clinic has facilities to see the vocal folds on the monitor using a rigid telescope and showing this image to the patient helps in patient compliance towards the treatment.

A large percentage of voice disorders in tertiary hospitals are due to unilateral vocal fold paralysis. This can be attributed to a large number of referrals, cancer surgery for the thyroid, food pipe or trachea, Cardiovascular Thoracic surgery, Trauma, congenital paralysis and Strokes. Tuberculosis remains an important cause of vocal fold paralysis. A vocal fold paralysis is labeled idiopathic only when a CTscan of the base skull to upper mediastinum is unremarkable.

Vocal fold polyps, nodules and cysts are formed as a result of vocal abuse (talking too much) and vocal misuse (talking with a wrong technique).One wrong technique of talking is using the false vocal folds to talk rather than the true vocal folds. This is called ventricular phonation.

With age, like muscles everywhere in our body, the vocalis muscle also atrophies resulting in bowed vocal folds with a gap between them.Hypothyroidism, laryngopharyngeal reflux and smoking (especially in women) may cause vocal fold oedema referred to as Reinkes oedema.

Due to the widespread use of chewing and inhaled tobacco in India, laryngeal cancer remains an important cause of dysphonia.Human Papilloma Virus can cause multiple papillomas in the larynx that often is a cause of dysphonia in children.

Spasmodic dysphonia is a laryngeal dystonia and the patient has a voice with spasms that often is mistaken to be psychogenic. A neurologist’s examination is vital to rule out causes such as Parkinsonism, myasthenia, ALS etc

An absence of the sub-epithelial layer of the vocal fold creates a gutter called sulcus vocalis.