Condition	Characteristics
Angioedema	Painless nonpitting edema most pronounced in the head and neck
Epiglotittis	Fever, difficulty swallowing, drooling, stridor; infection usually confined to the epiglottis
Laryngotracheobronchitis (croup)	“Barking” cough, stridor, possibly dyspnea; usually occurs in children three months to three years of age
Peritonsillar abscess	Unilateral sore throat, tender lymphadenopathy on the affected side, fever
Retropharyngeal abscess	Sore throat, fever, dysphagia, odynophagia, neck pain, dyspnea; patients usually have a history of trauma; posterior pharyngeal edema and lymphadenopathy; abnormal lateral neck radiography