What is the reason for asking for leave during menstruation?

Explain that you are not feeling well and need to ask for leave to rest. The reason for taking time off during menstruation should be that you are unwell and need to take time off to rest. Use euphemism and accurate wording. It can be said that I want to take a day off because I am not feeling well, and I hope I can approve it. When taking leave, you should fill in the leave slip, go through the leave formalities according to the prescribed process, and do a good job of handover.