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Voice Disorders. A voice disorder is when the voice has a problem with pitch, volume, tone, and other qualities. These problems occur when the vocal cords don't vibrate normally. Your voice is the sound that air makes when it is forced out of your lungs and passes over your vocal cords.
Laryngitis is the medical term for inflammation and swelling of the larynx, which is also known as the voice box. Most of the causes of laryngitis, such as common viruses infections or using your voice too much, are not serious.