I want to ask for leave. How can I tell my boss that he will believe me? I have diarrhea now. Speed. Thank you very much.

I want to ask for leave because I have diarrhea. Tell my boss the truth directly. If I can give you a holiday, I will naturally give you a holiday. I don't think there is a question of believing it or not.

You can say to your boss like this: boss, I can't get out of bed because of diarrhea or even weakness in my legs and feet. This state can't work normally, and it's inconvenient to go to the toilet all the time, so I ask you for a day off.

Personally, I suggest that you should go to work if it is not a special situation. Often ask for leave, in addition to the boss's disgust, it is likely that there will be excellent employees to take your place. So pay more attention to this.