Wearable medical devices have sparked a true revolution in patient monitoring, shifting healthcare from hospitals and clinics to continuous follow-up in patients’ everyday environments. These devices include smartwatches, monitoring bands, biosensors, and internet-connected measuring tools that continuously track vital indicators such as heart rate, oxygen levels, sleep quality, physical activity, and even glucose levels for diabetic patients. What distinguishes these devices is their ability to transmit data directly to smart medical systems, allowing physicians to monitor a patient’s condition in real time and intervene quickly when abnormal changes occur. This transformation represents a major shift in healthcare, providing proactive care instead of traditional care that depends on hospital visits only when problems arise. Wearable devices also contribute to improving patients’ quality of life by providing a continuous sense of safety, reducing unnecessary medical visits, and easing the burden on hospitals. Big-data analytics and artificial intelligence technologies enable the use of this data to identify health patterns, predict diseases, and customize treatment plans tailored to each individual’s condition. With ongoing development, these devices will become a fundamental pillar of modern medicine and a vital enabler of patient-centered healthcare.