I was recently diagnosed with a chronic illness (I don't want to say what it is, in case someone figures out who I am). I may have to take more sub days than usual for appointments. I will also be going on some new medication and I don't know what side effects I may have. Do you think I should tell my principal about my diagnosis? If so how much detail should I give? Right now, I am the only person who teaches my subject at my school. I love it because then I can do whatever I want. (My school is big on people who teach the same class having the same class structure, same notes, etc. and I find it really restrictive). I'm scared that if I tell my principal my diagnosis, he will think I can't do my job, or he will think I'm more likely to take a medical leave, and he will hire someone who can also teach my subject. So far I haven't needed accommodations at work, although I guess if my illness gets worse I may need some. I have been in the process of getting this diagnosis since January, and my department head knew something was up (and keeps asking about my heath...) but I don't think my principal knows anything yet. I'm also not too sure what to say the next time my department head asks about my health (he is doing it to be conversational/friendly but I am never sure how to respond).