Sadness can be a sign of depression but doesn't always indicate it. Depression and sadness can occur suddenly or gradually. Feeling sad alone doesn't necessarily mean depression
Lack of sleep affects mental and emotional resilience. Exhaustion from work or caregiving can lead to feelings of emptiness. Chronic sleep deprivation sets stage for negative thinking
Mood is a stable affective state, often positive or negative. Unlike emotions, moods are general and less intense. Mood affects thinking, feeling, and behavior significantly
Mood swings are rapid and intense changes in emotions. Can occur without obvious cause or be triggered by specific events. Common causes include illness, developmental stages, and medications. Hormonal changes and allergies can influence mood
Sleep apnea, narcolepsy, and chronic fatigue syndrome can cause morning sleepiness. Sleep paralysis may occur during waking or falling asleep
Loss of interest (anhedonia) is a key symptom of depression. It can also be caused by anxiety, bipolar disorder, or trauma. Decreased interest can create a cycle of isolation and depression