A baby who coughs more in the morning and does not cough during the day should be aware of the possibility of upper airway cough syndrome, which used to be known as postnasal drip syndrome. Children with upper airway cough syndrome have a prolonged cough, which is usually caused by rhinitis or sinusitis. In addition to coughing, there is a frequent runny nose, and the patient often feels a flow of fluid through the back of the nose, the mouth, and the throat, and these secretions may lead to irritation of the throat, which can cause coughing to occur. The most common cause of upper airway cough syndrome is allergic rhinitis. If it is determined that allergic rhinitis is the cause after a visit to the ENT department, oral or intranasal antihistamines or oral decongestants, oral leukotriene receptor antagonists, and so on, can be given, as well as nasal rinsing. Of course, hormonal nasal sprays can also be used to treat the child. In addition, if there is a sinus infection, it should be treated for sinusitis.