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Definition
By Mayo Clinic staffLaryngitis is an inflammation of your voice box (larynx) due to overuse, irritation or infection. Inside the larynx are your vocal cords — two folds of mucous membrane covering muscle and cartilage.
Normally your vocal cords open and close smoothly, forming sounds through their movement and vibration. But in laryngitis, your vocal cords become inflamed or irritated. This swelling causes distortion of the sounds produced by air passing over them. As a result, your voice sounds hoarse. In some cases of laryngitis, your voice can become so faint as to be undetectable.
Laryngitis may be short-lived (acute) or long lasting (chronic). Most cases of laryngitis are triggered by temporary viral infection or vocal strain and are not serious. But persistent hoarseness can sometimes signal a more serious underlying medical condition.
