[1] Septic arthritis is the purulent invasion of a joint by an infectious agent[5][6] with a resultant large effusion due to inflammation.

It can lead to irreversible joint damage in the event of delayed diagnosis or mismanagement.

[6] Gout is usually present with recurrent attacks of acute inflammatory arthritis (red, tender, hot, swollen joint).

It is caused by elevated levels of uric acid in the blood that crystallizes and deposits in joints, tendons, and surrounding tissues.

[citation needed] The treatment for joint effusion includes icing, rest and medication as advised by your doctor.