Katharine Kolcaba developed the Theory of Comfort in the 1990s to promote optimal patient outcomes. The theory defines comfort as satisfying basic human needs arising from stressful healthcare situations. It outlines three states of comfort - relief, ease, and transcendence - and four contexts - physical, psychospiritual, social, and environmental. The theory provides direction for nursing practice and research by focusing on a measurable, holistic, and positive outcome. Nurses can assess stressors and adjust care to increase patient comfort, which leads to improved health behaviors.