Primary sacroiliac arthritis occurs most often in the elderly, has a long and slow course and is an age-related degenerative disease, and therefore cannot be cured. Its treatment focuses on delaying the progression of the disease, reducing symptoms and improving quality of life. The recovery time and ultimately the prognosis for secondary sacroiliac arthritis depends largely on the nature of the primary disease; for example, patients with ankylosing spondylitis may take 1 to 2 years to achieve remission. In septic arthritis, recovery may be possible within 1 month if treatment is prompt.