I had a problem with shortness of breath, so bad I went to a lung specialist. It turned out that my band was tight enough to cause low grade acid reflux. This resulted in a condition called 'microaspiration' which means I was aspirating small amounts of stomach acid into my lungs while I slept. The telltale sign of this is that I would wake up in the morning with a faint sickly sweet taste in my mouth. This was irritating my lungs and after a few months of it, my lungs couldn't get clear. My lap band doctor had to take out all of the fill until my lungs cleared up. Hope this helps.