bleeding into the joint
<orthopaedics, rheumatology> Blood within a joint space. Commonly seen after trauma to a joint. ... May occur spontaneously in those with a blood clotting disorder (haemophilia) or those who are receiving anticoagulant medications. ... (27 Sep 1997) ... 
Bleeding into a joint, causing the capsule that encloses the joint to swell.
The swelling and pain resulting from bleeding into a joint.
Blood within the joint. May result following Injury, surgery or in some conditions(eg Haemophilia) spontaneously
bleeding into and swelling of a joint