When you have the flu, do you stay at work? Although the answer for some may be yes (thank you to you, colleague, who came to work to pass on the flu to everyone else), the real answer should be no. If you are not feeling physically healthy, you take a "sick" day. Your mental health should be no different. Feeling mentally or emotional unwell is a legitimate reason to take a day off work to recharge your batteries and engage in some self-care.