I've come down with a stomach bug and need to head home; I'll leave by [time].
Short notice
A stomach bug at Short Notice: What to Tell Your Boss
When a stomach bug comes up with little warning, a calm, specific message about cover matters more than a long apology.
Say what you need, briefly
A stomach bug can be contagious, so heading home is sensible. Keep it brief and non-graphic; that you're unwell and would rather not spread it is the point.
Handle short notice well
At short notice, acknowledge the timing briefly, state clearly what you'll leave and when, and name who covers anything urgent. Being specific about cover reassures your manager far more than an apology does.
Example messages
I'm unwell and would rather not risk passing anything on. I'll head out by [time].
Not able to keep working with this bug — I'll log off by [time] and follow up tomorrow.
Mistakes to avoid
Don't over-apologise for the timing or leave cover vague. State the plan clearly and keep it short.
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This page shares wording ideas, not legal or HR advice. Follow your own employer's time-off policy.
Common questions
How much should I say?
Very little. A stomach bug and needing to go home is complete.
How do I handle the short notice?
Acknowledge it briefly, be specific about what you'll leave and who covers, then move on.