New neighbours moved into the flat next door earlier this year. A nice couple with 2 boys. I haven't had too much interaction with them, just friendly greetings when we meet. In general, you can't hear much noise from next door but what I am hearing is him vomiting loudly almost every morning - so much so that it wakes me up. What I have noticed is is doesn't happen if they have overnight guests, which I do see them coming/ leaving. He's a nice guy, doesn't ever seem to be under the influence of anything. He is very slim.
It's becoming quite annoying to be woken by this or hearing it every morning. I don't know whether to say something or not?