Pelvic pain is a very common gynaecological complaint especially during the puerperium. It is rarely associated with development of septic sacroiliitis or haematogenous spread to other sites within the body. The case below demonstrates a 30 year old female 10 days post-partum presenting with left hand cellulitis secondary to development of septic sacroiliitis. Her case supplements a small cohort of reports among literature identifying septic arthritis in the postpartum period, recognises the delay to diagnosis and increased morbidity of this condition.