Im 35 male, quit smoking a month ago will help from Chantix. The last few weeks my right lung is sore, I can feel it through my chest, side and back. Also, it cracks or pops sometimes when I breathe in. I had a CT scan 3 or so months ago and had some small nodules all under 6mm so I don t think it can be cancer. I ve also notice both ears are full and I can pop them at anytime, which I ve never been able to do before. No coughing or any other sypmtoms