There is a difference between laryngeal tinnitus caused by calcium deficiency and phlegm caused by inflammation in the throat. Difference 1: laryngeal tinnitus is congenital, this is due to cartilage softening, and then inhalation, the larynx will be narrowed, followed by the phenomenon of laryngeal tinnitus, and sometimes there will be breathing difficulties, but the voice is quite normal. If there is phlegm, the child will have a snoring sound when sleeping, and will also be accompanied by fever, cough, rapid breathing and mental depression. Difference 2: If the laryngeal sound is severe, the child will choke on the milk when breastfeeding, and it is difficult to relieve it by changing the position. When there is phlegm, the child seldom chokes on the milk, but the appetite will be affected, and there will be obvious rales in the lungs when examined. There are many reasons for laryngeal tinnitus, some of which are due to the mother’s failure to replenish the nutrients during pregnancy, resulting in calcium deficiency, which in turn leads to incomplete development of the laryngeal cartilage, which leads to laryngeal tinnitus, and others are due to the baby’s own cartilage development abnormality, which will require later surgery to adjust. The symptoms vary from child to child, so it is important to go to the hospital as soon as possible if you notice any abnormality.