"a lonely woman A lonely woman gazes at a computer screen. Part of a series on Emotions Plutchik-wheel.svg Plutchik Dyads.png Acceptance Affection Anger Angst Anguish Annoyance Anticipation Anxiety Apathy Arousal Awe Boredom Confidence Contempt Contentment Courage Curiosity Depression Desire Despair Disappointment Disgust Distrust Ecstasy Embarrassment Empathy Enthusiasm Envy Euphoria Fear Frustration Gratitude Grief Guilt Happiness Hatred Hope Horror Hostility Humiliation Interest Jealousy Joy Loneliness Love Lust Outrage Panic Passion Pity Pleasure Pride Rage Regret Social connection Rejection Remorse Resentment Sadness Saudade Schadenfreude Self-confidence Shame Shock Shyness Sorrow Suffering Surprise Trust Wonder Worry vte Loneliness is a complex and usually unpleasant emotional response to isolation. Loneliness typically includes anxious feelings about a lack of connection or communication with other beings, both in the present and extending into the future. As such, loneliness can be felt even when surrounded by other people. The causes of loneliness are varied and include social, mental, emotional, and physical factors. Research has shown that loneliness is prevalent throughout society, including people in marriages, relationships, families, veterans, and those with successful careers.[1] It has been a long explored theme in the literature of human beings since classical antiquity. Loneliness has also been described as social pain—a psychological mechanism meant to motivate an individual to seek social connections.[2] Loneliness is often defined in terms of one's connectedness to others, or more specifically as "the unpleasant experience that occurs when a person's network of social relations is deficient in some important way".[3]"