Core Points - The article highlights the increasing cases of bronchiolitis among children as the weather turns colder, with approximately 70% of cases linked to respiratory syncytial virus (RSV) [1][2] Group 1: Disease Overview - Bronchiolitis is primarily caused by RSV infection, which spreads through droplets and leads to swelling of the bronchial mucosa, resulting in breathing difficulties and wheezing [2] - Infants under 2 years old, especially those under 6 months, are more susceptible due to narrower airways and weaker immune systems [2] Group 2: Symptoms and Diagnosis - Typical symptoms of bronchiolitis include rapid and labored breathing, with signs of oxygen deficiency such as the "three recessions" during inhalation and nasal flaring [3] - Abnormal respiratory sounds can be heard near the baby's back, resembling a "hula-hula" sound [4] Group 3: Home Care and Treatment - Home care recommendations include maintaining indoor humidity around 60% to aid mucus clearance, frequent repositioning and back patting to loosen mucus, and feeding in small amounts to prevent choking [4] - The preferred treatment involves nebulized corticosteroids and mucolytics, with antibiotics generally unnecessary as most cases are viral [5] Group 4: Emergency Signs - Immediate medical attention is required if symptoms such as cyanosis, rapid or slowed breathing, lethargy, or refusal to feed occur [5] - Children with a history of allergies or allergic family conditions may need extended nebulization treatment [5]