When should I seek medical advice for a swollen left arm?

You should contact a healthcare provider if you notice any of the following with your swollen left arm:

Sudden or severe swelling Pain or tenderness in the arm Redness or warmth over the swollen area, which could indicate infection Fever or chills Numbness, tingling, or weakness in the arm or hand Difficulty moving your arm or fingers Swelling that worsens or spreads Shortness of breath or chest pain, which may signal a blood clot traveling to the lungs (pulmonary embolism)

Early evaluation helps diagnose the cause and prevent complications.