What Does It Mean When One Leg Suddenly Turns Red and Swollen?

Sudden Redness and Swelling in One Leg: What It Could Mean

If one leg suddenly becomes red, warm, and swollen, it may signal a serious health issue that needs prompt medical attention.

Common Causes:

  1. Deep Vein Thrombosis (DVT): A blood clot in a deep vein, often in the leg. Can lead to a life-threatening lung clot (pulmonary embolism). Watch for swelling, pain, or shortness of breath.

  2. Cellulitis: A bacterial skin infection causing redness, warmth, swelling, and sometimes fever. Needs antibiotics quickly.

  3. Superficial Thrombophlebitis: A clot in a vein near the skin. Usually less serious than DVT but still needs evaluation.

  4. Venous Insufficiency: Poor blood flow causes gradual swelling and redness, sometimes worsening suddenly.

  5. Other Causes: Gout, injury, or lymphedema.

When to See a Doctor:
Seek immediate care if the swelling is sudden, painful, warm, or accompanied by fever, chills, chest pain, or shortness of breath.

Conclusion:
Don’t ignore sudden leg swelling—it could be serious. Quick action can prevent complications.

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