<prompt> Acute onset of a cough, stridor and dyspnea in a child is mostly due toForeign bodyAcute AsthmaAspiration pneumonitisPrimary complex  <response>: Choking and coughing episodes accompanied by wheezing are highly suggestive of airway foreign body - NelsonForeign body aspiration should always be considered as a potential cause of stridor and airway obstruction in children. --- O.P. GhaiForeign body aspirationInfants and toddlers use their mouths to explore their surroundings.So, they are very prone to aspirate a foreign body.The most common age group is 6 months to 4 years.Most common foreign body aspirated is nuts peanuts.Most airway foreign bodies lodge in a bronchus right more than left.Clinical manifestionsThree stages of symptoms may results : -Stage I - Initial event Violent paroxysm of coughing a most common symptom, choking, gagging and wheeze immediately after aspiration. If the obstruction is complete, child may be unable to vocalize aphonia and there may be cyanosis. If the obstruction is incomplete drooling and stridor may occur.Stage II Asymptomatic The foreign body becomes lodged, reflex fatigue and immediate irritating symptoms subside. This stage is most treacherous and account for a large percentage of delayed diagnosis and overlooked foreign bodies.Stage III - Complications Obstruction, erosions or infection can cause fever, hemoptysis, pneumonia and atelectasis. The most serious complication of foreign body aspiration is complete airway obstruction. 