Spondyloarthritis is an umbrella term that describes two main categories of cases: axial spondyloarthritis and peripheral spondyloarthritis.

Axial Spondyloarthritis (AxSpA) is a condition causing painful inflammation in the spine and/or the sacroiliac joints, which connect the spine to the pelvis.

Peripheral Spondyloarthritis (pSpA) causes inflammation in joints other than the spine or sacroiliac joints. People with peripheral spondyloarthritis may experience painful inflammation in the hands, wrists, elbows, shoulders, knees, ankles, feet, or other joints.