Pertussis belongs to infectious diseases and certainly poses some risk to health, with the degree of harm varying greatly from person to person. Typical symptoms include paroxysmal, barking coughs, fever, and runny nose. Some may also exhibit cyanosis (bluish hue to lips) and signs of hypoxia. Coughing can also lead to runny nose, teary eyes, and even convulsions, nausea, and vomiting. Some patients may present with an inspiratory crowing sound. Treatment involves anti-inflammatory measures based on the number of infectious pathogens and specific symptoms, and isolation precautions should be taken to prevent the infection from spreading to other children.