- Linked to prior gu and gi infxns in particular, but now known to be linked to any infection
- Onset ~ 1-4 weeks following infection (GU chlamydia, enteritis, other)
- Chronic LBP and SI joint pain, morning stiffness, decreased ROM
- Asymmetric migratory arthritis affecting one to few joints: knees, ankles, wrists in particular
- Also eye, finger and oral sx
- Joint sx resolve w/in 6m in 50%
- Warmth, pain and redness of affected joints
- Pain over SI joints and low back
- Dactylics→ finger/toe swelling
- Enthesiitis→ tendon insertions
- Uveitis, conjunctivitis