Hi [Manager], I am not feeling well and need to head home. I will leave by [time] after handing off anything urgent.
Feeling unwell
Feeling Sick at Work: How to Message Your Boss and Go Home
When you feel too unwell to keep working, a short, honest message is all you need. You do not have to explain symptoms in detail.
Keep it brief and honest
Say that you are not feeling well, that you need to head home, and roughly when you will leave. You can offer to hand off anything urgent. Naming a general reason like feeling unwell is enough; symptom details are your choice, not an obligation.
Send it as soon as you know
Tell your manager the moment you realise you cannot continue, rather than pushing through and leaving suddenly. Early notice lets them cover anything time sensitive and shows you are being considerate even on a hard day.
Example messages
Hi [Manager], I have come down with something and cannot keep working today. Could I pass [task] to someone, or follow up tomorrow?
Hi [Manager], I am unwell but can manage a few quiet tasks from home. I would like to leave the office by [time] if that is okay.
Common mistakes to avoid
Do not over-share medical detail, and do not wait until you are visibly struggling. Avoid vague messages with no leaving time; a clear time helps your manager plan.
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This page shares wording ideas, not legal or HR advice. Follow your own employer's time-off policy.
Common questions
Do I have to say what is wrong?
No. Feeling unwell or under the weather is a complete reason. Share more only if you want to.
Should I message or call?
A message is fine for most workplaces and gives a written record. Call if your team expects it or if it is urgent.