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U-M Health SystemThis information is approved and/or reviewed by U-M Health System providers but it is not a tool for self-diagnosis or a substitute for medical treatment. You should speak to your physician or make an appointment to be seen if you have questions or concerns about this information or your medical condition.
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Superficial Thrombophlebitis

What is superficial thrombophlebitis?

Superficial thrombophlebitis (ST, or SVT) is a condition in which inflammation causes a blood clot to form in a vein near the surface of the body. Often it develops in varicose veins, usually in the leg or arm. Varicose veins are enlarged veins close to the surface.

How does it occur?

ST occurs when a clot forms in a vein because blood flow in the vein slows down or stops. ST can occur after minor injury to a vein, for example, after a bruise or after you have had an IV (medicine or fluid given through a vein). It can also occur after intense exercise.

What are the symptoms?

Symptoms of superficial thrombophlebitis may include:

  • tender cordlike vein that is very sensitive to touch or pressure
  • redness and warmth in the area around the vein
  • swelling in the area around the vein.

How is it diagnosed?

Your healthcare provider will ask about your symptoms and examine you. He or she will usually be able to determine if you have ST from the physical exam. In some cases you may have special ultrasound or X-ray studies to check for clots in deeper veins, which are more serious than problems with the superficial veins.

How is it treated?

For treatment, your healthcare provider may recommend that you:

  • Take an anti-inflammatory drug, such as aspirin or ibuprofen.
  • Rest and elevate your arm or leg while you have pain and swelling, typically for 1 week.
  • Put warm, moist compresses on the inflamed area. Be careful to avoid burns. If you are using a heating pad, do not lie on it.

How long will the effects last?

With proper treatment, ST usually lasts 1 to 2 weeks.

How can I take care of myself?

  • Follow your healthcare provider's instructions.
  • Ask if you may do exercises in bed and how soon you may start taking daily walks.
  • If you have varicose veins, ask your healthcare provider if you should wear special support stockings.

How can I help prevent ST?

Because ST usually results from injury, it is hard to prevent.

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Published by RelayHealth.
Last modified: 2008-11-10
Last reviewed: 2008-09-15
This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.
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