Note: Please, focus on the question above. References no more than 5 years old. Objectives: Analyze the historical background of unpleasant symptoms. Evaluate the use the theory of unpleasant symptoms in nursing research and parctice. Learning outcomes: Critically analyze the philosophical underpinnings of nursing theories. • Critique nursing’s conceptual models, grand theories, and mid-range theories. • Construct a nursing theory that represent current professional nursing practice.