The legs have two sets of veins, deep veins and superficial veins (close under the skin), blood goes from the superficial to the deep veins. Clots usually form in the deep veins though they can occur in the superficial veins as well.
Whereas the arteries in our bodies have thin muscle our veins do not and they rely on the contractions of the surrounding muscles to return the blood to the heart.
Some persons with a history of DVT can have a complication called post thrombotic syndrome
where the clot resulted in damage to the valves or veins.Some of the symptoms of this include: swelling of the leg due to a build up of fluid, varicose veins
, heaviness, itching or tingling
Initial treatments include leg elevation and the use of compression stocking, in some cases medication can be used.
You should speak to your doctor so he or she can assess the swelling and initiate appropriate treatment
i hope this helpful to you