While writing a sick leave WhatsApp message, inform your manager about your illness, the date/day you will be absent, and your availability for urgent work. The earlier you send the message, the better. So that your manager can plan the workload.
Don’t write a long message; don’t overshare about your illness details unless asked. Here are the sample sick leave WhatsApp messages that you can send to your manager.
Simple Sick Leave Whatsapp Message

Sir, I am unable to come to the office today because of a severe stomachache. I request a leave today.
I'll take my medicine and come to the office as usual from tomorrow.
When you’re not sure when your health will recover:

Sir, I have a severe headache and fever, so I can't come to the office today.
If the fever persists, I will inform you again in the evening.
But most likely, I will come to the office tomorrow.
So please give me leave. If there is any urgent work, I will take it on call.
If illness persists:

Sir, I still have a high fever. I met the doctor; he gave me medicine and asked me to take one more day of rest. So please give me leave. I will come to the office from the day after tomorrow.
If your health still doesn’t recover, make a direct phone call to your manager/boss and explain your situation, and share the doctor’s prescription and reports.
Recommended : Sample not feeling well message to boss (examples)
Tips to Write a Sick Leave WhatsApp Message
- Clearly say why you are absent; if you don’t explain, it may look like you don’t care about work.
- Give a genuine reason, don’t fake it.
- Keep the message short and respectful. Managers prefer to the point messages.
- Mention tha you will complete the pending tasks or hand them over if needed. This shows responsibility.
- Use words like “request”, “please”, and “informing” which make your WhatsApp message professional.
- You should include reason, day/date, and expected return.