Is it possible for superficialthrombophiltis to become a dvt?

DVT: While it is possible, it is probably not likely. Nonetheless, you should be evaluated by your doctor.

Yes, rarely.: Superficial thrombophlebitis can rarely extend into the deep venous system. Traditionally, has not been treated with anticoagulation but with heat, elevation and anti inflammatory medications (i.e. Motrin). New 2012 accp recommendations suggest 45 days anticoagulation for "extensive" superficial thrombophlebitis (if clot is >5 cm in length).

Extremely unlikely : However the reason why someone developed superficial thrombophlebitis is very important, since the same risk factor could also be a risk for dvt.

Unusual: Thrombophlebitis and DVT are different animals. It is "possible" but very rare. Superficial disease does not progress to DVT unless there are other risk factors such as cancer or clotting issues.

Superficial vein: it is possible for superficial vein blood clot to become a deep vein thrombosis if the clot travels to the junction point where the superficial vein and deep vein meet, either at the groin or behind the knee. So careful evaluation and pain mind to the track of the clot is critical. A venous Doppler sonogram should be performed, as often the clot will extend above where it is visible.