To summarize and answer the most frequently occurring problems and questions for children with precordial disease, with the aim of helping those children and their families who have not yet been treated or have been treated. I. The correct way to tap the back to expel sputum Arch the back of the hand in a hollow shape, right down and up, from the outside to the inside, fling the wrist with an even rhythm, leaving no dead space between the left and right lungs (avoiding the spine). Soothing methods when crying 1.Wrapping: For younger babies and toddlers proper wrapping will make them feel safe. 2. Touch and response: Stroke the child’s head and communicate with him/her. 3.Soft music and pacifier: It is easy to make children quiet. 4.Hug and distraction: For older children after the full moon, use toys to distract them. 5.Crying when you put it down: This reaction is mostly due to the lack of security in the child’s heart, so you should “bear the pain” and gradually exercise the child alone in bed and avoid too much embrace. 1. Performance: Severe cyanosis occurs when the child is nursing, crying, defecating or exercising vigorously. 2.Treatment 1）Change the position: immediately put the child in lateral, bent knee or bent knee prone position to increase the amount of blood return. 2）Oxygen: 6-8L/min mask, 2-4L/min nasal cannula. 3）Sedation: use sedative drugs or drag the child’s buttocks to make him/her lie on his/her shoulders. (4) Promptly seek medical advice and active prevention. Fourth, pediatric fever treatment 1, ice bag: place the ice bag on the child’s forehead and under the armpit (Tip: the ice bag and the skin with a dry towel between the separation, so as to avoid local tissue frostbite in children). Contraindicated: ice bags should not be placed on the chest, abdomen, to prevent heart rate slowdown, diarrhea. 2.Cold compress on the head: change the towel after it becomes warm and measure the body temperature after half an hour. 3, warm water scrub: water temperature of about 38 degrees, wet the towel and scrub the child’s armpits and groin for 5-10 minutes, and measure the temperature after half an hour (Tip: the water temperature should not be too hot or too cold, avoid the abdomen and precordial area). 4, drug cooling: oral antipyretic agents (Tylenol, ibuprofen per kilogram of body weight) can be taken.