3. Mental anguish
Now here is one of the good excuses to miss work for a week, only if you have the guts to do it. As much as employers hate listening about diarrhea or periods, what they loathe even more is discussing mental issues and feelings of anxiety. You should say you’ve been experiencing a lot of mental anguish about an upcoming life event (getting married, last kid going to college, etc.). You have trouble focusing on the figures at work, and you could use some time off to work things out. It works like a charm.