I started to have slippage, my doctor explained to me that "slippage" is caused when you loose weight very fast, and he'll have to go back in a restitch it in place, it can also be caused by vomiting too much. This happened to me, I didn't realize it for 11 weeks, I just thought i was eating too much, or eating to fast, or not chewing enough, but when i couldn't hold water down I knew i had to call. I had an upper GI and nothing would pass through the band, so they completely deflated my band and I was back on liquids for 10 days, after that I had another upper GI and everything seems good, so they refilled me, and everything has been great since then.