Inflammation of a vein. http://dictionary.reference.com/browse/phlebitis

"Phlebitis (fle-BYE-tis) means inflammation of a vein. Thrombophlebitis is due to one or more blood clots in a vein that cause inflammation. Thrombophlebitis usually occurs in leg veins, but it may occur in an arm. The thrombus in the vein causes pain and irritation and may block blood flow in the veins. Phlebitis can occur in both the surface (superficial) or deep veins. " Source: http://www.emedicinehealth.com/phlebitis/article_em.htm

Blood clots or inflammation of a vien It tends to be something that is a leg problem more than anything.

Disease of the phleb.

The term phlebitis refers to an inflammation of a vein, usually in the leg, frequently accompanied by blood clots that adhere to the wall of the vein. When the affected vein is close to the surface, the condition is called superficial phlebitis. Symptoms of superficial phlebitis include pain, swelling, redness, and warmth around the affected vein. The vein feels hard to the touch because of the clotted blood. When phlebitis occurs in a deep vein, it is called deep vein thrombosis (DVT). DVT is a life-threatening condition because a clot could dislodge from the vein and lodge in the lungs. Deep vein thrombosis is more difficult to diagnose. It can occur without any symptoms until the clot reaches the lungs. However, in about half of cases, there are warning symptoms including swelling, pain and warmth in the entire calf, ankle, foot, or thigh (depending on where the involved vein is located). Although these symptoms can also be caused by more benign conditions, deep vein thrombosis is such a life-threatening disorder that needs immediate medical attention. http://www.mayoclinic.com/health/thrombophlebitis/DS00223 http://www.britannica.com/eb/article-9059736/phlebitis http://www.medterms.com/script/main/art.asp?articlekey=4874 http://www.veincenter.com/phlebitis.html

it is an inflammation of the vein most common in the leg although i had it in my arm after a long stay in hospital i had a canular removed an caught the infection.