What is Leg SVT?
A superficial vein thrombosis (SVT), also called superficial thrombophlebitis, is a blood clot in a vein just beneath the skin of the leg, most commonly in a varicose vein. SVT is painful but is generally less serious than a DVT, though it can extend into deep veins if not treated.
Common symptoms
- A red, warm, tender cord-like lump along a vein under the skin
- Localized burning or throbbing pain
- Mild swelling around the affected area
- Hardness along the vein course
🚨 Seek emergency care immediately if you have:
- Worsening or spreading redness and pain
- Clot extends toward the groin or into the deep system
- New leg swelling involving the whole leg
- Fever or signs of infection
- Any shortness of breath or chest pain
Call 911 or go to the nearest Emergency Department.
Treatment
Treatment is typically 45 days with an anticoagulant. NSAIDs and compression stockings can help with symptoms. Follow up with your doctor as directed.
Trusted resources
Thrombosis Canada
thrombosiscanada.ca →Clot Connect
clotconnect.org →Contact your clinic
This information is for educational purposes only and does not replace personalized medical advice from your healthcare team.