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Nasal congestion is the blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels.〔(【引用サイトリンク】title=Nasal congestion )〕 It is also known as nasal blockage, nasal obstruction, blocked nose, stuffy nose, or plugged nose. Nasal decongestants target the discomfort directly. These come as nasal sprays, inhalers, and as oral pills. Nasal congestion has many causes and can range from a mild annoyance to a life-threatening condition. The newborn infant prefers to breathe through the nose (historically referred to as "obligate nasal breathers"). Nasal congestion in an infant in the first few months of life can interfere with breastfeeding and cause life-threatening respiratory distress; in older children and adolescents it is often just an annoyance but can cause other difficulties. Nasal congestion can interfere with the hearing and speech. Significant congestion may interfere with sleep, cause snoring, and can be associated with sleep apnea. In children, nasal congestion from enlarged adenoids has caused chronic sleep apnea with insufficient oxygen levels and hypoxia, as well as right-sided heart failure. The problem usually resolves after surgery to remove the adenoids and tonsils. Nasal congestion can also cause mild facial and head pain, and a degree of discomfort, often from allergies or the common cold. == Causes == * Allergies〔 * Common cold〔 or influenza * Deviated septum * Hay fever,〔 allergic reaction to pollen or grass * Reaction to medication (e.g. Flomax) * Rhinitis medicamentosa〔 a condition of rebound nasal congestion brought on by extended use of topical decongestants (''e.g.'', oxymetazoline, phenylephrine, xylometazoline, and naphazoline nasal sprays). * Sinusitis or sinus infection〔 * Inversion may cause blood vessels in the nasal passage to inflame. * Pregnancy may cause women to suffer from nasal congestion due to the increased amount of blood flowing through the body.〔 * Nasal polyps〔(Nasal congestion ) at MedlinePlus, a service of the U.S. National Library of Medicine, National Institutes of Health. Update Date: 8/2/2011. Updated by: Neil K. Kaneshiro. Also reviewed by David Zieve.〕 * Concha bullosa * Empty nose syndrome * Gastroesophageal reflux disease (theorized to cause chronic rhinosinusitis- the "airway reflux paradigm") 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「Nasal congestion」の詳細全文を読む スポンサード リンク
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