Just as our muscles become fatigued from a hard workout, our brain can also reach a point of fatigue. Although what causes someone to hit this wall varies from person to person, common causes include “being in a lot of situations that require us to be responsible, to be present for others, or that bring up a lot of emotions,” says therapist Joseph Zagame. That sounds a lot like what any parent faces on any given day.

Mental exhaustion takes a toll. It messes with your sleep and mood, makes you less patient, and could increase unhealthy coping mechanisms. What helps: learning the common signs, and recognizing when you need to recalibrate.