Patients who have recovered from a previous episode of phlebitis (deep venous blood clot) frequently are left with residual damage to the delicate valves in the deep veins, as well as compensatory enlargement and insufficiency of the more superficial veins. This leads to chronic increased venous pressure at the ankles, producing swelling, brown discoloration, and eventually nonhealing open sores (venous stasis ulcers). Proper prevention and treatment requires the expertise of a trained vascular surgeon. Any patient who has suffered an episode of phlebitis will benefit from a consultation.