No one wants to get sick, especially if it gets in the way of you being able to go to work and earn your pay. If you do have to call in sick, be sure that you have your illness figured out so you do not sound like you are faking over the phone. If you are doing a fake calling in sick, stick to one illness so you are not confused when you return to work and people ask how you are feeling. Depending on what kind of relationship you have with your supervisor, speak in a respectful tone, or be straightforward and say you are sick and can’t go to work.