1. You are ill/sick or had an accident and can not work.
  2. Let your team and your lead know that your are sick and when you expect to feel better. If your lead isn't in or on holidays, you can contact HR.
  3. Update everyone on how you are feeling if it takes longer then expected. Stay home until you are better.
  4. Let everyone know when you are back.

FYI:

Work at Blendle