This is UK English. It can just mean feeling unwell here, though it can also refer to throwing up. It's quite a vague term.
You think the NHS website is going to list a symptom of some illness as feeling unwell?
I'm from the UK too. I'm fairly certain that they mean nausea and throwing up.
People tweeting stuff. We allow tweets from anyone.
RULES:
This is UK English. It can just mean feeling unwell here, though it can also refer to throwing up. It's quite a vague term.
You think the NHS website is going to list a symptom of some illness as feeling unwell?
I'm from the UK too. I'm fairly certain that they mean nausea and throwing up.