The little boy Qiang Qiang is 13 years old, inside the school Qiang Qiang likes to talk and shout a lot, every day back to the mother found Qiang Qiang’s voice will be very hoarse, I heard others say that the child to the voice change period, so Qiang Qiang throat hoarse into such a way to do? Before puberty, there is almost no essential difference between the voices of boys and girls. When the boy reaches puberty, he has difficulty in vocalizing high notes and poor staying power, and his voice range also decreases significantly, and his voice becomes coarse and hoarse, his chest voice increases, his tone becomes darker and other obvious changes, and his voice range first becomes narrower and then wider; the girl’s voice becomes sluggish due to vocal cord congestion, and then gradually improves and becomes rounded and her voice range becomes wider, especially in terms of tone with unique female characteristics. This phenomenon of voice change during the growth period of physical and mental development is called “voice change”, and the whole process of voice change (including the early, middle and late) is called “voice change period”. This is the stage that both boys and girls must go through, the physical and mental transition to maturity. The early and late period of voice change is influenced by a variety of factors. Generally speaking, the vocal change period for boys is between the ages of 13 and 15, and for girls between the ages of 12 and 14. Usually the vocal change period for boys is longer than that for girls, ranging from a few months to nearly a year, while girls are shorter than boys, taking about 6-10 months to complete. In addition, girls begin to change their voices about 6 months to 1 year earlier than boys and have much lighter voice changes than boys during the voice change period. Clinical symptoms Because adolescent children like to speak and sing loudly, they are always ready to show their loud voices. As a result, the growing vocal cords can be affected by inattention. At this time, the vocal cords are extremely delicate and may become congested, edematous, or develop vocal cord nodules or vocal cord polyps if care is not taken, resulting in fatigue and weakness in pronunciation and change in pitch in mild cases, or long-term hoarseness in severe cases. Therefore, it needs to be especially noted that students at this stage should avoid high notes when singing and avoid prolonged vocalizations and singing. Music teachers should teach songs with narrower ranges and lower pitches in song selection that are adapted to the student’s changing voice stage. Parents of children should also be patient and explain to their children the physiological characteristics of the vocal change period, and teach them not to make loud noises or use their voices excessively, so as not to overwork and aggravate the congestion of the vocal cords, which will affect the normal development of the vocal cords during the vocal change period. How to protect the voice? Don’t abuse your voice excessively, shout or make loud noises, especially don’t sing or shout excessively. 2. Avoid your child catching a cold or flu. Pay special attention to keeping warm in winter, try not to wear low-necked clothes, bring a scarf, and pay attention to keeping the neck warm so as to avoid cold in the throat and pharynx. Cold and flu can aggravate the swelling and congestion of the vocal cords. In addition to paying attention to the weather changes and the appropriate increase or decrease in clothing and bedding, moderate participation in some sports activities, daily physical exercise to enhance physical fitness, the healthy growth and development of the vocal cords is also very beneficial. 3, to ensure that children sleep enough. Don’t stay up too late doing homework, not to mention staying up late, and ensure that you get more than 7-8 hours of sleep every day. 4, diet should pay attention to light, do not eat or eat less stimulating food, try not to eat acid, spicy, stimulating such as garlic, chili, ginger, leek, etc., because these foods will stimulate the trachea, larynx and vocal cords. Do not drink too hot boiling water in winter, do not eat too cold cold drinks in summer, do not drink cold water immediately after strenuous exercise. 5, the harmful substances in tobacco and alcohol on the growth and development of adolescents (including the growth and development of the vocal cords) is very harmful, parents should put the tobacco and alcohol in a safe place, so that children are not curious to take. 6. Don’t talk too much, and don’t eat cold drinks immediately after a long time of talking to avoid strong stimulation of the vocal cords. Whenever you feel dry after using your voice, you should drink more warm water and pay attention to indoor and environmental hygiene. 7.For children who have hoarseness, they should forbid their voice for a week or try to speak less and drink more water to reduce the inflammation of the larynx. If hoarseness cannot be improved, they should go to a specialist clinic for examination and treatment, and nebulized inhalation therapy is available for those who are in a position to do so. 8. Parents should not just buy Chinese herbal medicines such as fatty sea and panacea to give to their children. Abusing these two kinds of Chinese medicines not only cannot prevent and relieve children’s sore and mute throat, but also have certain side effects, which may add to the inflammation of the throat, and going to a specialized hospital for examination and treatment is the right choice.