Meaning of phlebitis: Redness, warmth, swelling, and tenderness along a vein, most often in the leg, are the hallmark signs of phlebitis.

Definition of phlebitis

Phlebitis is inflammation of a vein, most often occurring in the legs, that produces localized redness, warmth, swelling, and tenderness along the affected vessel. It most commonly affects a vein located just beneath the skin, though deeper veins can also become inflamed.

The inflammation can result from a range of causes, including infection, direct injury to the vein such as from an intravenous line, prolonged immobility, or irritation from certain medications delivered through a vein. In many cases, phlebitis affecting a superficial vein is a limited, self-contained problem rather than a sign of a more serious underlying process.

Phlebitis affecting a vein deep within the leg is of greater concern, since inflammation in this setting is often related to or accompanied by a blood clot, which carries a risk of the clot traveling to the lungs. This distinction between superficial and deep vein involvement shapes how the condition is evaluated.

How phlebitis is built

phleb itis phlebitis
  • phleb/o Combining form · Greek vein
  • -itis Suffix · Greek inflammation

A medical term is read from its ending backwards: the suffix first, then the prefix, then the root. See all 223 word parts.

Used in a sentence

The nursing assessment noted redness and tenderness along the vein, consistent with phlebitis at the intravenous site.

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Good to know

Phlebitis affecting a superficial vein is generally a more limited problem than inflammation involving a deep vein, since deep vein involvement is often related to a blood clot capable of traveling to the lungs.

Word origin

Where “phlebitis” comes from

Formed from Greek phleps, phlebos, meaning vein, and the suffix -itis, meaning inflammation.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.