Internal Medicine, or Internal Diseases, is a medical discipline concerned with the diagnosis, treatment, and management of various diseases related to internal organ systems in adult individuals. This branch encompasses a wide range of organs and systems, including the cardiovascular system, respiratory system, digestive system, kidneys, liver, endocrine system, hematology, immunology, and infectious diseases. Specialists in Internal Medicine are experts in managing conditions such as hypertension, diabetes, hyperlipidemia, thyroid disorders, rheumatic diseases, gastrointestinal problems, chronic kidney disease, anemia, infections, and multisystemic diseases. The diagnostic process involves a comprehensive physical examination, laboratory tests, imaging techniques, and, if necessary, advanced procedures such as biopsy. Treatment approaches are planned to include pharmacological therapy, lifestyle modifications, monitoring of chronic conditions, and referrals to other specialties when required.