內科, or internal medicine, is a medical specialty focused on the diagnosis, treatment, and prevention of adult diseases. It encompasses a wide range of conditions affecting various organs and systems, including the heart, lungs, kidneys, and digestive system. Internists, or internal medicine physicians, often serve as primary care providers, managing chronic illnesses and coordinating care for complex medical issues. Internists are trained to handle a variety of health concerns, from common ailments to serious diseases. They utilize diagnostic tools and techniques to assess patients' health and develop treatment plans. This specialty emphasizes a comprehensive approach, considering the whole patient rather than just specific symptoms.