The longest recorded time a human has gone without sleep is 11 days and 25 minutes, set by Randy Gardner in 1965. This feat was achieved under controlled conditions, and there are no verified examples of anyone staying awake longer. While some individuals have claimed to go longer, these accounts are not scientifically validated.
While it's unclear how long humans can truly survive without sleep, it's evident that extreme symptoms can start appearing after just 36 hours of being awake. After 24 hours of sleep deprivation, signs of sleepiness, irritability, and anxiety become increasingly apparent. These symptoms worsen with prolonged sleeplessness.
It's important to note that sleep deprivation is a serious issue that can have significant consequences on physical and mental health. If you are experiencing difficulty sleeping, it's essential to consult with a healthcare professional for proper diagnosis and treatment.