Hi T.,
My pediatrician said there is a virus going around that settles in the chest area. My son's turned into walking pneumonia.
My son is 17 and had a persistent cough for 3 weeks. He was diagnosed with walking pneumonia. The viral type of pneumonia not bacterial. It doesn't show up in x-rays or blood tests according to my doctor. He has been on an abuterol inhaler and z pack. They told me with pneumonia.. either type, you don't want to suppress the cough as coughing helps clear the lungs. IT was hard as he coughed at night a lot at first. They told me to run a vaporizer/humidifier to help. I read on the internet to push the fluids to keep the mucus thin. Also if your child has allergies maybe he/she could take some claritin? if that clears the cough up then you know it was allergies..just a thought. He may have drainage causing the coughing..
My son plays basketball and has been having trouble breathing so I took him back to the doctor. I'm so glad that I did.. they restricted him playing basketball for a week.. and they put him on prednisone for 4 days and upped the albuterol dose.
I don't know that this is what is going on with your child but it never hurts to go back to the doctor and have them listen to their chest. It seems this virus that is going around can go into just about anything.
take care and good luck!