Causes of joint swelling are varied, but a top cause is rheumatoid arthritis. Osteoarthritis typically occurs with age and can lead to joint swelling. Gout is another potential cause.

Reference:

arthritis.webmd.com

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Resource:

  1. what causes joint pain & swelling? – http://www.ehow.com/facts_5558398_causes-joint-pain-swelling.html
  2. what are the causes of swelling of lymph nodes & increase in joint pain? – http://www.ehow.com/facts_5704149_causes-nodes-increase-joint-pain_.html?ref=Track2&utm_source=ask
  3. What causes Joint swelling ? – http://www.drugs.com/enc/joint-swelling.html
  4. Why Causes Joint Swelling? – http://www.healthcentral.com/osteoarthritis/h/why-causes-joint-swelling.html