After 24 hours without sleep, cognitive functions like attention and memory start to decline sharply

At 48 hours, you may experience mood swings, irritability, and impaired judgment

By 72 hours, hallucinations and microsleeps can occur, severely affecting your brain’s ability to function

Physical effects include weakened immune response and slowed reaction times, increasing accident risks

Prolonged sleep deprivation can cause high blood pressure and increased stress hormone levels

Your body desperately tries to recover, leading to intense sleep rebound once you finally rest