Children always clear their throats and hum with the sound of external factors and disease factors, both of which may cause throat discomfort resulting in children appearing clear throat hum phenomenon, the specific analysis is as follows: 1, external factors 1, environmental factors: dry weather or when there is odor stimulation in the air, the throat will be affected by the environment, dry and itchy, at this time children may appear clear throat hum 2. Drinking too little water: When children drink too little water every day, the lack of liquid in the throat will cause dry throat and dry mouth, and even pain, which may be relieved by clearing the throat. 1. Upper respiratory tract infection: It is a common situation that children have common cold, pharyngitis, tonsillitis, chronic pharyngitis, rhinitis and other upper respiratory tract infectious diseases, which may lead to mucosal edema and increase sputum or nasal secretions, stimulating the throat or nasal mucosa and causing discomfort, resulting in children clearing their throats repeatedly. 2. Children may clear their throats and hum with the sound, and when they are stressed or tense, they may also have obvious twitching symptoms, and usually have symptoms such as blinking, tilting the neck, shaking the head, making the nose, frowning, nuzzling, opening the mouth, shrugging the shoulders, etc.; 3, anxiety disorder: If children are under a lot of stress in school or life, they may have symptoms of clearing their throats and humming, which are caused by mental factors. If children are found to always clear their throat with humming sounds, first of all, they can drink more water and eat more fruits, while breathing more fresh air, staying away from dust and smoke, and keeping the humidity of the surrounding environment to improve the symptoms. If the symptoms are not relieved, the child should go to the hospital as soon as possible for further diagnosis.