A "difficult case" refers to a situation or problem that is challenging to resolve or understand. This term is often used in fields like medicine, law, or psychology, where professionals encounter complex issues that require careful analysis and consideration. These cases may involve multiple factors, conflicting information, or unique circumstances that complicate decision-making. In medicine, a difficult case might involve a patient with unusual symptoms that do not fit a standard diagnosis. In law, it could refer to a legal matter with ambiguous evidence or intricate regulations. Professionals must apply critical thinking and expertise to navigate these challenging scenarios effectively.