The vocal change period refers specifically to adolescents between the ages of 14 and 16 years old, and the vocal change period for girls is generally between the ages of 13 and 15, and at the latest 16 years old. As females grow older, the growth of their larynx and vocal cords accompanied by hoarseness, narrowing of voice range, articulation fatigue, local congestion and edema, and increased secretions can lead to a different speaking voice from that of childhood, usually lasting six months to a year. During this period, girls may experience hoarseness, dry throat, itchy throat, and foreign body sensation in the throat. At the end of the voice change period, girls’ voices will change significantly. It is recommended that girls use their voices in moderation during this period, avoiding loud arguments and loud singing. At the same time, girls should pay attention to keeping warm, combine work and rest, take regular rest and rest, ensure sufficient sleep, maintain psychological and emotional stability, avoid spicy and other stimulating foods, prohibit smoking and drinking alcohol, and go to the ENT clinic regularly for checkups to correct bad tendencies in time.