“…The most frequent cause of obstruction of the upper airways are due to organic changes such as nasal polyps, adenoid hypertrophic and / or tonsils, more frequent; allergic rhinitis, deviated septum, sinusitis and nasal turbinate hypertrophy 6,12,14 Regarding to the adenoids and the tonsils they are present in all children since birth and tend to increase in size from to 2 to 6 years old, period in which the hyperplasia of all lymphoid tissues occur. The physiological hyperplasia of the lymphoid palatal and pharyngeal of the mass probably explains why the oral breath is common during the 4 th and 12 th years of life, and tend to physiologically reduce during puberty and thereafter, when there is atrophy of tonsils and the increased dimensions of the nasopharyngeal airway 2,7,14,15 . The most common features found are: shortness of breath or respiratory failure, rapid fatigue in the physical activities, back or neck muscles pain, halitosis, dry mouth, choking during sleep, sleep poorly, daytime sleepiness, saliva while talking, irritability , change in chewing, poor concentration followed by poor school performance 3,6,9 .…”