When children have dry cough without sputum, parents should pay extra attention, because children are young, to exclude whether there is a foreign body obstructing the child’s trachea or bronchial tube, because this situation will compress or pull the airway, resulting in airway irritation, which will cause irritating dry cough symptoms. In addition, children with dry cough without sputum may also be due to the following reasons: 1, irritating factors: for example, children around the environment in the dust, smoke, or air too dry, etc., may stimulate the children’s respiratory mucosa, so that children with irritating dry cough, usually transient, no sputum secretion; 2, allergic factors: some children may have allergic rhinitis, cough variant asthma, eosinophilic pneumonia, etc., in this case, the children may have a dry cough, and then the children will be able to cough, but not to cough. Allergic factors: some children may have allergic rhinitis, cough variant asthma, eosinophilic pneumonia, etc., which can lead to airway narrowing due to ventilation dysfunction, thus triggering the emergence of irritating dry cough in children, usually with no sputum secretion; 3. Infectious factors: for example, upper respiratory tract infections, bronchitis, bronchiolitis, pneumonia-induced cough, which also manifests itself in the early stage as irritating dry cough. There are also special pathogens, such as mycoplasma infection caused by cough, usually also to irritating dry cough; 4, special diseases: some special diseases can also lead to dry cough without sputum symptoms in children, such as subphrenic abscess or diaphragmatic hernia. There are also children with coughs that may be caused by other systemic abnormalities, such as coughs caused by gastroesophageal reflux, which is also characterized by a dry cough.