Whether a girl’s voice can be thinner or not needs to be analyzed on a case-by-case basis. If you were born with a coarse voice, it is possible that your vocal cords are thicker and wider due to genetics, so it is unlikely that your voice can be thinner. If the voice is coarse due to disease, it can usually be restored after treatment. There are mainly the following clinical situations: 1, respiratory tract infection: If girls have recent colds, coughs and other upper respiratory tract infections, it may be laryngitis that causes vocal cord problems, and they need to go to the hospital for laryngoscopy in time, and after active treatment, their voices can be restored; 2, vocal cord hyperplasia: Long-term incorrect use of voice and excessive vocalization may lead to vocal cord hyperplasia, such as vocal cord nodules, vocal cord polyps, vocal cord white spots, etc. It is recommended to go to the ENT department of a regular hospital for an electronic laryngoscopy to clarify the diagnosis and give symptomatic treatment such as nebulization and oral medication. If long vocal cord polyps, it is recommended to do vocal cord polyp removal surgery, and the coarse voice will be improved; 3, endocrine abnormalities: due to the strong secretion of androgens in girls’ bodies, resulting in masculine features such as coarse voice and more hair in patients, which are commonly seen in endocrine abnormalities, if necessary, go to the endocrinology department for consultation.