It is not unheard of that a condition like hives can coincide with a flare up in arthritic condition's,
The swelling of a joint makes movement more difficult. The idea being that moving an injured joint could cause further injury.
That could be just a sprain.
Rheumatoid arthritis
arthocentesis
yes
That is frequent finding to see that patient with hemophilia gets the swelling, usually of one of the knee joint.
to identify the cause of swelling in the joints, to relieve pain and distention from fluid accumulation in the joint, and to diagnose certain types of arthritis and inflammatory joint diseases
arthritis is the swelling around the joints, usually finger and toes but could be any joint.
Check with a veterinarian. It could be joint ill or an abscess that needs to be treated.
swelling in one or more joints may indicate arthritis swelling in several joints especially the same joints in opposing sides of the body can also be an indication of rheumatoid arthritis.
Nipping or chewing the leg can cause swelling for a dog i recommend going to the vets