A 3-month-old baby’s nose is huffing and puffing, which indicates a lack of ventilation. Firstly, we need to see if there is booger, if there is booger, we need to clean it out carefully; if there is no booger, this could be due to two reasons, one of them is a slight cold symptom, that is, a little bit of catching a cold, in this case, we need to give the child a dose of Pediatric Protecting Tong Pellet, and give more water to the baby, pay attention to keep the baby warm to avoid catching a cold again. Second, you need to go to the local hospital to rule out other causes of airway obstruction. If all other causes are ruled out, it is laryngeal hypoplasia and softening of the cartilage of the larynx, in which case the baby will have this sound, which is a sign of calcium deficiency. To give your child calcium supplement, you can give your child cod liver oil supplement, and then take your baby to sunbathe, and it will naturally get better when he/she gets older.