First and foremost, the most typical symptom is hoarseness of voice, with accompanying symptoms varying depending on the severity of the laryngitis, and symptoms differ. Generally, mild cases may present with cough or fever; a few children might also have gastrointestinal symptoms, such as vomiting and diarrhea. If there is laryngeal obstruction, some signs of hypoxia will appear, such as cyanosis, intermittent stridor, profuse sweating, the three-concavity sign, flaring of the nostrils, listlessness, and even some convulsive symptoms.