I have definitely had a problem with this for many years. I will stay up late (mostly to avoid the terror of going to sleep) even though I know how terribly it affects my mood and health. I will work far past the point of productivity, neglecting my own health and self-care like cleaning my house, going to the gym, shopping for healthy food, etc. It's so HARD to take care of myself. I don't feel like I have a right to do it.

I don't know if I consider it SI, but I definitely consider it the opposite of self-care, just like SI is. I have been trying to change my habits the last few months to take better care of myself, and it has made a big difference--well-rested! Healthily fed! Exercised and ready to work hard! But it is so hard to sustain and not fall back into my old habits.