A 5-month-old baby has a cough with phlegm, no fever, seeking treatment advice

After pneumonia treatment, patients may still experience wheezing sounds, especially severe in the morning, accompanied by a hissing sound as if coming from the throat. During physical activities like running or jumping, there may be heavy breathing. Treated at Xuzhou Children’s Hospital, the patient received pneumonia oral liquid and azithromycin granules. One week later, the follow-up visit showed that the lung mycoplasma had turned negative. However, why is there still wheezing? What is the cause? The patient coughs two to three times a day without fever or cold symptoms. What’s going on?