I've noticed a pattern that DD6, tends to have a night where she vomits when we have a short break somewhere in the UK. This has only happened on UK breaks rather than abroad, and not every time, but nearly every time. There is never a fever with it, she wakes up after being asleep, says she is going to be sick and then is sick once or twice. Fine the next day. Anyone have any ideas? We have put it down to over indulgence of junk food or that she is a thumb sucker. But she didn't have any junk food yesterday and this happened last night again. Could it be post travel sickness? She had a Kwell yesterday because we had long bus rides. She often has had a Kwell when we are away and she has been sick but not consistently so can't put it down to that. She also has Kwells when we are at home sometimes and isn't sick then. I'm just baffled because it seems more than coincidence now.