I have a question. I have had a breathing problem since December 1. For some reason everytime I breathe everything I do comes from the left side of my body. Whether I am sitting, standing, laying down its like one side of my lungs is working. All the air is coming from the left. I have taken a chest xray, an ultrasound on my abdomen and pelivis, and a blood test still nothing. My pulminologist thinks that I might have a mass in my neck that is preventing air from going to the right. I am not sure. On Monday I am having an endoscopy done and hopefully they could find something. I have been very frustrated. Air only on one side of the body. If you have any suggestions on what I may have please respond. Thank you. In addition, I am only 20 years old and I play tennis so this thing that I have is puzzling.