INTJs are often night crawlers sleepy by day, fully awake at night. The world is created for larks which can adapt themselves to a daytime routine. It's hard to fix sleeping schedule, but an unbalanced sleep regime may cause damage to the nervous system.

I can go days with no sleep at all and still full charged but I would be so furious and easily annoyed. Most of the times, I would sleep for very long hours resting my mind from problems.

I would sometimes skip my sleeping schedule to spend my time with someone dear to me 'I tactically feel no tiredness at all' it's magic!