I wonder what I my company's policy regarding this kind of sick leave is. I've been here nearly a year and only taken 1/2 day off - I was so nauseous and sick and really couldn't be at work. But my colleagues had personally seen me, and told me to go home. I know if we take Tues, Wed or Thurs off we don't need a sick note. But if I come in the next day looking physically 100%, I will always get funny looks. And I'm not in a position, I feel, to tell my managers or HR department. I'd rather wait till I get called in for my performance slipping before I try explain why. Or even better, just carry on doing my best. But I just have no concentration and continuously need new challenges, so I can be a real headache, both for myself and my employer