It didn't hurt at all. She just had to keep the mask on and breathe normally. The treatment is meant to open her lungs more. Jersey was very good and kept ever so still during each five-minute treatment.
That was not the case in between treatments or when we awaited the results of the chest X-rays. Thank goodness I had the foresight to bring my trusty Nintendo DS so the Werz could play Super Mario Bros. because we were there FOR.EV.ER.
In fact, after waiting another 30 minutes at the pharmacy to fill her three prescriptions (the doctor said it wasn't pneumonia, a nurse said it was ... so who knows?), a dinner at China Buffet and ice cream that she didn't even eat, Jerz conked out on the drive home. (She was awake long enough to see the double rainbows, though!)
