Penetration syndrome is a common reason for consultation in the emergency department. It is a source of morbidity and mortality, especially in children between 1-3 years old. It is manifested by a sudden onset of choking, coughing and cyanosis while the child is perfectly healthy. We report the case of a 4 years old boy who suddenly presented dysphonia and dyspnea grade 2 (mMRC scale). He was brought to the emergency room after six weeks of persistent symptoms.