Antiphospholipid Syndrome (APS) is an autoimmune disorder where the immune system mistakenly produces antibodies against phospholipids, which are essential components of cell membranes. This condition can lead to increased blood clotting, resulting in complications such as deep vein thrombosis, pulmonary embolism, and stroke. APS can occur on its own, known as primary APS, or alongside other autoimmune diseases, such as lupus. Diagnosis typically involves blood tests to detect antiphospholipid antibodies. Treatment often includes anticoagulant medications to reduce the risk of clotting and manage symptoms effectively.