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Laryngitis is an inflammation of the larynx. It causes hoarse voice or temporary complete loss of the voice because of irritation to the vocal folds (vocal cords). Dysphonia is the medical term for a vocal disorder, of which laryngitis is one cause. Laryngitis is categorised as acute if it lasts less than three weeks and chronic if it last over three weeks. The chronic form occurs mostly in middle age and is much more common in men than women. Antibiotics do not appear to be very useful in the acute form. ==Signs and symptoms== *Dry, sore, burning throat *Coughing, both a causing factor and symptom of laryngitis *Dysphagia (difficulty in swallowing) *Sensation of swelling in the area of the larynx *Cold or flu-like symptoms (which, like a cough, may also be the causal factor for laryngitis) *Swollen lymph nodes in the throat, chest, or face *Fever *Coughing out blood *shortness of breath, predominantly in children *Increased production of saliva. In early stages, erythema (reddening) and edema of epiglottis, aryepiglottic folds, arytenoids and ventricular folds occurs. In late stages, the vocal folds and subglottic structures are also involved. There are sticky secretions between cords and in interarytenoid region. Sometimes, submucous hemorrhage is seen, especially in case of vocal abuse. Acute membranous laryngitis, a condition resembling acute membranous tonsillitis, is caused by pyogenic nonspecific organisms. It has to be differentiated from laryngeal diphtheria. In some cases tightening of the chest may be present due to COPD or other relevant breathing disorder. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laryngitis」の詳細全文を読む スポンサード リンク
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