Children’s hoarseness may be physiological factors, but also may be the manifestation of certain diseases, such as colds, laryngitis, vocal polyps, etc., should consult a doctor in time to find out the cause. 1. Physiological factors: the most common reason is that children usually like to talk too much, use their voices, and even like to shout loudly, thus causing hoarseness. 2. Pathologic factors: (1) colds: pathogen invasion caused by upper respiratory tract infections, nasopharyngeal mucosal inflammation stimulation can appear pharyngeal discomfort, sore throat, causing hoarse voice. (2) laryngitis: baby laryngeal cavity is narrow, laryngeal submucosal tissue relaxation, mucosal lymphatic vessels, inflammation is very easy to produce edema and obstruction of the laryngeal cavity, resulting in hoarse voice. (3) Vocal polyps: benign hyperplastic lesions of the vocal cords, manifested by hoarseness, which can lead to loss of voice in severe cases. This symptom alone is not enough to diagnose the disease, and may be caused by other factors. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease and give targeted treatment.