Children always clear their throats due to a foreign body sensation in the nasopharynx, which may be related to allergic rhinitis, chronic rhinitis, chronic pharyngitis and so on. 1. Allergic rhinitis: more dust and pollen in the environment can also stimulate the nasal cavity to cause allergic reactions, leading to increased secretions, causing discomfort in the nasopharynx, and children are always clearing their throats. 2. Chronic rhinitis: due to repeated episodes of acute rhinitis, improper nasal medication, etc., resulting in chronic inflammation of the lower layer of the nasal mucosa, leading to an increase in nasal mucosal secretions. It may flow backward from the nasopharynx to the pharynx, stimulating the throat to produce discomfort, and children will make the action of clearing the throat. 3. Chronic pharyngitis: If the infection and other causes of chronic pharyngitis in children, resulting in the feeling of foreign body in the throat, the phenomenon of frequent throat clearing will occur. Children always clearing their throats, can also be seen in other reasons, it is recommended to consult a doctor in a timely manner, in accordance with the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the causes, and targeted treatment or treatment.