Most of the boys’ voice change period starts at the age of 14 to 16 and can be completed before the age of 18. Because of the different development of individuals, the time of voice change period varies. Boys enter puberty, the laryngeal vocal folds will grow and develop, the laryngeal nodes in the neck increase in size, there may be an increase in secretions, local congestion, edema and other phenomena, resulting in hoarseness, low voice, this phenomenon is generally to be maintained for about a year. During the period of voice change, you need to pay attention to the protection of voice, eat less spicy and irritating foods such as chili peppers, and do not speak loudly for a long time, so as to reduce the stimulation of the throat and improve the hoarseness of the voice. At the same time, because puberty is a period of vigorous growth and development, need to pay attention to nutritional supplementation, you can eat more protein and calcium content of high food, and at the same time you can do some exercise in moderation, such as basketball, etc., so as to promote the growth of height.