Livedo reticularis is a vascular condition characterised by a mottled, lace-like pattern of purplish discolouration on the skin, typically seen on the extremities due to altered blood flow and capillary dilation. It is clinically significant as it can indicate underlying conditions such as vasculitis, thrombophilia, or systemic diseases, necessitating further investigation. A key association is its occurrence in antiphospholipid syndrome, where it may signal increased thrombotic risk.