Coronary restenosis is a medical condition characterized by the narrowing or blockage of coronary arteries after an initial intervention, such as angioplasty or stent placement, to treat coronary artery disease. Despite the success of these procedures in restoring blood flow to the heart, restenosis can occur over time, leading to recurrent symptoms like chest pain or angina. The underlying mechanism involves the re-growth of tissue within the treated artery, known as neointimal hyperplasia, or the recurrence of atherosclerotic plaque. Various factors contribute to the development of coronary restenosis, including patient-specific characteristics, procedural techniques, and the type of devices used. Researchers and clinicians continually strive to develop strategies to minimize the risk of restenosis, such as drug-eluting stents that release medication to inhibit tissue growth. Management often involves a combination of medications and lifestyle modifications to address the underlying coronary artery disease and reduce the likelihood of recurrence, highlighting the ongoing challenges in optimizing long-term outcomes for patients with cardiovascular conditions.