Cognitive Decline: Lack of sleep affects one's capacity for focus, memory, and judgement.
Mood Disorders: Lack of sleep worsens mood disorders by increasing tension, anxiety, and irritability.
Risk of Mental Illness: Lack of sleep increases the possibility of mental illness, including anxiety, depression, and even psychotic illnesses.
Emotional Instability: Sleep loss breaks off mental balance, making people more reactive and unable to handle stress.
Stress Response: Insufficient sleep affects stress hormones, which raise stress levels both mentally and physically.