Vocal change in 11-year-old boys may be normal. According to statistics, Chinese boys start pubertal development at the age of about 13, that is, they show secondary sexual characteristics, such as the appearance of throat knots, voice change, the rapid growth of beard and height, accompanied by the development of external genitalia. In modern times, with better nutritional conditions and the possibility of receiving more video and audio stimulation, the brain is exposed to too much information and some boys may develop earlier and show the above-mentioned secondary sexual characteristics earlier. If the advancement is only within the normal range of performance, there is usually no problem. If an 11-year-old boy has a change of voice, along with other manifestations, such as too early appearance of secondary sexual characteristics, for example, eventual height and rapid development of external genitalia, precocious puberty should be suspected. Precocious puberty is a disorder that usually develops much earlier, for example, at the age of 9-10 years, and requires clinical exclusion of abnormalities in the adrenal cortex, other endocrine changes, and even endocrine tumors. Therefore, if you find that an 11-year-old boy has a change of voice, you should go to the hospital and let the doctor evaluate whether the development is normal and early or precocious.