Any inflammation of the joints, including the gout. A variety of forms of arthritis are recognized, some of which (such as rheumatoid arthritis, also called arthritis deformans and arthritis nodosa) are chronic and progressive, and lead to incapacitation and deformity.

The painful swelling of joints

an inflammation of the joints that is often caused by the aging process or exposure to dampness. older animals are more susceptible than younger ones.

Inflammation of the joint, characterized by pain, swelling, stiffness, and redness. Arthritis is not a single disorder but the name of joint disease from a number of causes. It may involve one joint or many and can vary in severity from a mild ache and stiffness to severe pain and, later joint deformity.