For me it really depends on who is asking. A lot of my co-workers know I've been ill, and when certain sympathetic co-workers ask how I am feeling, I know they genuinely mean, how are my tummy troubles & arthritis. For most people though, I just automatically say "good". A co-worker who isn't so clued in asks every day how am I doing, but I know with her she's just being polite and doesn't care one iota about what's going on with my health, so I always just say I'm good. Today I passed a little bit of blood in my stool and then ran into that particular co-worker right afterwards. She asked how I was doing, and I said "good" in the least convincing way possible. She didn't even seem to notice and accepted it at face value. I'm not super good at social situations or social cues, but I'm learning who I can and cannot speak to about my illness. It really is a situation that varies by individual for me.