Generally speaking, there are more chances for infants to suffer from laryngeal stridor, because the respiratory tract of infants is not well developed, and it is usually narrower, together with some other factors, it will cause laryngeal stridor. Infants can suffer from laryngeal stridor as follows: firstly, after the infant suffers from laryngitis, and at the same time infected with viruses, bacteria and other pathogens, caused by acute laryngitis, will cause the child to cough, hoarseness, and laryngeal stridor, and the child will often also have inhalation-like dyspnea, triple concave sign and other manifestations; Secondly, the infant in the newborn soon after the occurrence of laryngeal stridor, which is mostly due to the child suffers from congenital laryngochondral dysplasia caused by symptoms. This is mostly due to congenital laryngeal cartilage dysplasia, at this time the children do not have fever, the mental state is also good, there is no accelerated respiration, you can give the children calcium gluconate supplements.