Introducing the diagnosis and treatment of laryngospasm occurred in cases of clinical and surgical authors (Pediatric Otolaryngology) in the rout of a year (January 1st to December 31th of 2011) at the San Jose-Tec of Monterrey Hospital and Christus Muguerza High Specialty Hospital of Monterrey, NL Mexico. We emphasize the predisposing or aggravating factors such as tobacco addiction involuntary premedication inadequate, anxious child (aerophagia), pain (delayed gastric emptying), history of respiratory infection in the last four weeks, gastroesophageal reflux, pharyngolaryngeal reflux, neuromuscular disorders, changes the mechanism of digestion, Child Cerebral Paralysis, asthma, vocal cord paralysis, etc. as presenting the greatest risk for laryngospasm. The overall incidence of laryngospasm is 0.87%. In the first nine years of living is 1.74% with a higher incidence of 2.82% in the first three months of life. The peak appears at 9.6% in children who present an infection of upper airways in the last six weeks. The morbidity is the main oxygen desaturation, followed by bradycardia, pulmonary edema after obstruction by negative aspiration pressure and cardiac arrest is very rare. The presentation may be laryngospasm during induction (in this case we have repeated the incubation), during incubation (most of our series), position change (transfer), and after surgical recovery (which reports the Most of the series). We divided the treatment in mechanical maneuvers (most give in to it), pharmacological medication (midazolam, propofol, relaxing and nitroglycerin which has the fastest action) and reintubation.