Yes, lack of sleep greatly impairs emotional regulation. Sleep deprivation weakens the brain’s prefrontal cortex, which manages rational thinking, while overactivating the amygdala, which governs emotional responses. As a result, people become more irritable, anxious, and reactive. Chronic poor sleep is associated with higher risks of depression and anxiety disorders. Furthermore, fatigue reduces problem-solving ability, focus, and resilience. Good sleep hygiene—such as setting regular sleep schedules, limiting screen time before bed, and creating a calming bedtime routine—can restore balance. Proper rest is essential for emotional stability and overall mental health.