There are many clinical factors that may cause hoarseness in children, and it may be caused by the following factors: 1. The hoarseness is caused by excessive crying and excessive use of the throat. In this case, the child should avoid crying excessively, and will usually get better automatically in a week or so. 2. Acute laryngitis caused by viral or bacterial throat infection may be the cause, usually accompanied by fever of different degrees. This is a condition that requires antibiotics or antiviral medication under the guidance of a doctor to relieve the symptoms. 3. It may also be caused by a child who drinks less water or eats less fruit, which can lead to fire and constipation. When your child has a hoarse voice, you should drink more water and reduce the use of your voice.