What are the symptoms of phlebitis?
Phlebitis causes redness, warmth, and tenderness along a vein, often with a firm, cord-like feel to the vein and mild swelling around it, usually in the leg or arm. Whole-limb swelling, shortness of breath, or chest pain are warning signs of a deeper clot and need urgent evaluation.
What Phlebitis Feels and Looks Like
Superficial phlebitis, inflammation of a vein just under the skin, tends to produce a cluster of symptoms in one spot along the path of a vein, most often in the leg but sometimes the arm:
- A red or discolored streak running along the line of the vein
- Tenderness or soreness that gets worse when you press on the vein or move the limb
- Warmth in the skin over the inflamed vein
- A firm, rope-like or cord-like vein you can sometimes feel under the skin
- Mild, localized swelling right around the affected vein
These symptoms usually stay confined to a small area and come on over hours to days.
What These Symptoms Mean
Redness, warmth, and tenderness are the body’s inflammatory response to an irritated vein. A vein that feels hard and cord-like often means a small clot has formed inside a surface vein, which is called superficial thrombophlebitis. On its own this is usually not dangerous, but it tells you the vein is both inflamed and clotted, so the symptoms deserve attention rather than being ignored.
Phlebitis frequently follows an IV line, an injury, varicose veins, or long periods of sitting still. Knowing the trigger helps explain the symptoms but does not change the need to watch for the warning signs below.
Which Symptoms Are Dangerous
Some symptoms point away from a harmless surface vein and toward a deep vein clot (DVT) or a clot that has reached the lungs:
- Swelling of an entire leg or arm, rather than a small patch, is the classic warning sign of a DVT
- Deep, aching calf or thigh pain with tightness or heaviness
- Sudden shortness of breath, chest pain, a racing heart, or coughing up blood, which suggest a pulmonary embolism and are a 911 emergency
- Fever, spreading redness, or pus over the vein, which can mean an infected vein
Because superficial phlebitis and DVT can look alike, a venous ultrasound is often the only way to be sure which one you have.
For a complete guide, see our phlebitis page. If your symptoms are severe, spreading, or come with any breathing trouble, Bellaire ER is open 24/7 at 5302 Bellaire Blvd and can image the vein on site. Walk in any time or call (713) 660-0001. For a life-threatening emergency, call 911.