What is Arm SVT?
An arm superficial vein thrombosis is a blood clot in a vein near the surface of the arm, often occurring at an IV or blood draw site. It usually resolves with conservative treatment but should be monitored for extension.
Common symptoms
- Redness, warmth, and tenderness along a visible vein
- A palpable cord-like hardening under the skin
- Mild swelling around the affected area
- Skin discoloration over the vein
🚨 Seek emergency care immediately if you have:
- Rapid spread of redness or streaking up the arm
- Fever or chills (may suggest infection)
- New arm swelling beyond the immediate area
- Shortness of breath or chest pain
Call 911 or go to the nearest Emergency Department.
Treatment
Most arm SVTs resolve within 1–2 weeks. Anticoagulation may be prescribed if the clot is large or close to a deep vein. Warm compresses and elevation can help with comfort.
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.