What are the signs that a swollen right arm requires medical attention?

You should seek medical care for a swollen right arm if you notice any of the following signs:

Sudden or severe swelling that develops quickly Pain or tenderness in the swollen area Redness or warmth over the skin, which may suggest infection Fever or chills indicating possible infection Numbness, tingling, or weakness in the arm or hand Difficulty moving the arm or fingers Swelling that spreads beyond the arm or does not improve Shortness of breath or chest pain, which may indicate a blood clot traveling to the lungs (pulmonary embolism)

Prompt medical evaluation is important to diagnose the cause and begin treatment as needed.