Internal medicine is a medical specialty focused on the prevention, diagnosis, and treatment of diseases in adults, particularly those affecting internal organs such as the heart, lungs, liver, kidneys, and gastrointestinal tract
. Physicians specializing in this field are called internists. They are trained to manage complex, multi-system, and chronic illnesses, often caring for patients with multiple concurrent health problems
. Internists work in both inpatient (hospital) and outpatient settings, providing comprehensive care that includes precise diagnosis, treatment, health promotion, disease prevention, and management of chronic conditions
. They are experts in dealing with undifferentiated symptoms and multisystem diseases that may not fit neatly into a single organ specialty
. Unlike family medicine physicians, internists focus exclusively on adult patients and do not typically provide care involving surgery, obstetrics, or pediatrics
. Their training is extensive, often involving postgraduate specialization and subspecialties such as endocrinology, infectious diseases, neurology, and more
. In summary, internal medicine is a broad and complex specialty dedicated to adult health care, emphasizing scientific knowledge, clinical expertise, and compassionate care for a wide range of medical conditions affecting internal organs and systems
