An assortment of inflammatory illnesses known as spondyloarthritis cause arthritis. Spondyloarthropathy, or SpA for short, is another name you may encounter. Because it also results in inflammation in places known as entheses where ligaments and tendons join to bones, it differs from other types of arthritis. Your bones are connected to one another by ligaments, and your muscles are connected to your bones by tendons. Lower back discomfort, peripheral joint arthritis, such as that in the arms, legs, eye issues, and even inflammatory bowel illness are all frequently brought on by spondyloarthritis (IBD).