The exact causes are not yet known, however Silica dust exposure has been identified in Australia and a number of genetic associations have been identified in a genome-wide association study of psoriasis and<unk>  including HLA-B27.
Psoriatic arthritis
Rheumatoid arthritis
Reactive arthritis
Inflammatory arthritis
Juvenile idiopathic arthritis
Post-traumatic arthritis
Enteropathic arthropathy
Oligoarthritis