How long does ADHD burnout last?

There's no set timer - ADHD burnout can last anywhere from a few days to several months, depending on how long you were overextended before it hit and how much rest and support you get afterward. It usually shows up after a stretch of masking, overcommitting, or white-knuckling through tasks that don't naturally hold your attention. The exit isn't 'push through' - it's lowering demands, protecting sleep, and rebuilding slowly instead of sprinting back to 100%.