Congenital laryngeal tinnitus is caused by excessive softness of the laryngeal tissue, which collapses inward and blocks the airway during inspiration. The cause may be the mother’s improper nutrition and insufficient calcium intake during pregnancy, resulting in a calcium deficiency in the fetus. After birth, the laryngeal tissues are excessively soft and loose, which easily causes the laryngeal tissues to collapse and narrow the laryngeal cavity into a live flap-like tremor during inspiration, resulting in a laryngeal sound similar to a cat’s cry or a bird’s call. Some babies with congenital laryngeal tinnitus are accompanied by mild or severe inspiratory dyspnea; in mild cases, the wheezing is intermittent, but in severe cases, it can become persistent, and may cause choking and coughing when breastfeeding is too urgent. Congenital laryngeal sound usually occurs a week or a few months after the birth of the baby, mostly when sleeping, awake is not obvious, frightened, cold, upper respiratory tract infection aggravated, some supine aggravated, prone or side lying reduced. However, the baby’s general condition is good, his cries are not hoarse, and his milk intake is normal. After that, as the baby grows older, when the laryngeal cartilage gradually develops and perfects, the laryngeal sound will naturally disappear. This is not the ghost of a cat, so young parents should not be overly alarmed.