If the child has phlegm in the trachea and bronchus but will not cough, the symptoms can be relieved by the following methods: 1.Promoting the discharge of phlegm by patting the back, parents can pat the child’s back with a hollow fist, gently patting from the bottom to the top, which can make the phlegm in the child’s trachea and bronchus discharge smoothly. 2.The phlegm can be diluted by nebulized inhalation to promote the discharge of phlegm, which can be treated by using drugs such as Pulmicort, Fullux and 3.Therapy can be carried out by taking phlegm-suppressing drugs, such as pediatric amiloride oral solution, and antibiotics, such as cefixime granules for anti-inflammatory treatment, to relieve inflammation in the trachea or bronchus and reduce the amount of sputum secretion.