DVT can be broken down into acute and chronic. Acute DVT is less than four weeks old. Chronic DVT is a clot that’s one or two months or older. Chronic DVT leads to organized clot that blocks blood flow and blood return from the lower extremities back to the heart. In patients that have chronic DVT, they often have swelling and redness of the lower extremities that’s difficult to manage. These are the patients that we often recommend to elevate their legs and to wear compression stockings.