Voice disorders are disorders in sounds that depend on the larynx (vocal cords) and affect the pitch, timbre, intensity or duration. The origin of such changes can be organic, physiological, psychological or environmental. In addition, there are two types of disorders: dysphonia and aphonia. Aphonia is the total loss of voice temporarily or chronic and can be caused by overuse of the vocal cords, respiratory disease, intake of toxic or irritating products, excessive cold or nervous causes. Treatment may include resting the voice, medication, voice therapy or, in severe cases, surgery. Dysphonia is a disorder of voice intensity due to an injury in the organs of phonation (organic) or poor use of the voice (functional). The most common causes of this condition are overly straining your voice (voice hyperfunction), gastroesophageal reflux, smoking, infections such as laryngitis or tuberculosis, neurological disorders of the larynx, tumors, and trauma, among others. The treatment involves learning relaxation techniques and breathing, exercising the shoulder, neck and face muscles, and speech therapy.