<unk>  is blockage of a vein caused by a thrombus (blood clot). A common form of<unk>  is deep vein thrombosis (DVT), when a blood clot forms in the deep veins. If a thrombus breaks off (embolizes) and flows to the lungs to lodge there, it becomes a pulmonary embolism (PE), a blood clot in the lungs. The conditions of DVT only, DVT with PE, and PE only, are all captured by the term<unk>  thromboembolism <unk> E). The initial treatment for<unk> E is typically either low-molecular-weight heparin (LMWH) or unfractionated heparin, or increasingly with direct acting oral anticoagulants (DOAC). Those initially treated with heparins can be switched to other anticoagulants (warfarin, DOACs), although pregnant women and some people with cancer receive ongoing heparin treatment. Superficial<unk>  or phlebitis affects the superficial veins of the upper or lower extremity and only require anticoagulation in specific situations, and may be treated with anti-inflammatory pain relief only. Various other less common forms of<unk>  also exist; some of these can also lead to pulmonary embolism.<unk>  thromboembolism and superficial vein thrombosis account for about 90% of<unk> . Other rarer forms include retinal vein thrombosis, mesenteric vein thrombosis (affecting veins draining blood from the gastrointestinal organs), cerebral<unk>  sinus thrombosis, renal vein thrombosis, and ovarian vein thrombosis.
Venous thrombosis
Migraine
Deep vein thrombosis
Venous ulcer
Thrombophlebitis
Phlebitis
Thrombosis
Lymphangitis