The ped says it's asthma and we should treat the infections as they happen and not to worry. I'm curious since she is on Septra prophylaxis and this has still happened, if chest percussion would help. I appreciate your opinion, unfortunately most doctors I ask for a second opinion are afraid of 'stepping on toes'.
Asthma causes inflammation in the lungs which can result in scarring.
Frequent lung infections can also lead to inflammation and subsequent scarring. Your daughter seems to be on an antibiotic to prevent infections. However, as you may know, the antibiotic can not prevent lung infections of a viral source. If she isn't already getting them, your daughter may benefit from a yearly flu shot to prevent lung infections from the flu virus. Mucus in the lungs can lead to difficulty breathing and can be a fertile ground for bacteria to grow on.