Children who always clear their throat and make humming sounds may be caused by bad habits, inflammation of the throat, tics and so on. 1. Bad habits: children may have developed the habit of clearing their throats, but there are no other symptoms of discomfort. 2. Inflammation of the throat: for example, pharyngitis, tonsillitis, etc., often causes dryness, foreign body sensation, pain and other symptoms in the throat, which can be relieved by clearing the throat. 3. Tourette’s syndrome: children often show long-term, high-frequency throat clearing, and will be accompanied by abnormal pronunciation. Children are always clearing their throats, humming may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.