What is the post-phlebitic or post-thrombotic syndrome?
Chronic symptoms include swelling, pain, and discoloration of the skin. A rusty discoloration of the skin, caused by iron deposits from old blood, is often the first sign, followed by chronic swelling. In severe cases, the skin can break down, allowing an ulcer (open sore) to form. After one year, only 2 to 3 percent of people develop these ulcers; by contrast, after five years, as many as 10 to 20 percent may suffer from such an ulcer on the legs. Not surprisingly, post-phlebitic (post-thrombotic) syndrome is more likely to develop after DVT that was associated with symptoms as opposed to a DVT that was diagnosed by imaging alone.