I was sleeved on 3/27 and as soon as I woke up I threw up a little bit of blood. Over 3/27 & 3/28 I threw up about 3 more times. Mostly I noticed after using pain meds which increased my nausea. With that being said its not the same type of throwing up that ive had over the years with the stomach flu, etc. There is just a small amount. And I was just so sure that it would hurt to throw up because I just had surgery, but it honestly didnt it was such a small amount and it wasnt like dry heaves or anything. My mom was sleeved in September and she has only threw up 2 times and she says the exact same thing I did that it surprisingly it does not hurt.I just had surgery and would do it over again, it wasnt easy right after I woke up I was very nauseous but after I stayed in the hospital an extra day and given anti nausea meds I am feeling so much better. Hope this helps!