kiwichick

Hi everyone - I'm new here. I haven't been sleeved yet, but i'm considering it seriously. However I do get scared /worried when I read about some people who have long term ongoing difficulties holding down food; fatigue; and having serious food intolerances. Are there any known reasons why these things happen and who might be more at risk of long term problems.... Or is it luck of the draw? Does anyone know? Thanks.