Posted in Web Deep Vein Thrombosis (DVT): Symptoms, Causes, Treatment February 19, 2025 A deep vein thrombosis (DVT) is a blood clot that forms in a vein deep inside your body. WebMD explains what causes it, as well as the symptoms and how you can prevent it. https://www.webmd.com/dvt/what-is-dvt-and-what-causes-it