A 9-year-old girl admitted to Kunming Children’s Hospital, Kunming City, Yunnan Province, China in November 2021 due to the "repeated reddish-brown ring-shaped rash on both lower limbs for 6 mo". In the beginning, the lesions were erythematous, where most of them are annular patches, appear on both insteps and ankles. Subsequently, the lesions evolved to both ankles, with sporadic itches. It recurs after topical glucocorticoids. They spread to both legs, with occasional itching. No clinic symptoms of hematuresis, hematocheiza, joint pain or hypodynamia observed during this period of time. The patient had no history of systemic symptoms, allergies and no specific history of past illness. Normal. Physical examination revealed good general condition. Dermatological examination results showed that these lesions are red brownish annular or petaloid patches with various size, 1-3 cm in diameters can be observed on both insteps, ankles and lower limber. And they do not fade when adding pressure. During this process, light brownish pigmentation can be observed central of these macules. No feel of infiltration and no atrophy when touching those lesions. Such lesions on instep are shown in Figure. Blood routine, urine routine, liver function, kidney function, antinuclear antibody, coagulation function and erythrocyte sedimentation rate tests were normal. Dermoscopy showed a large number of reticular or honeycomb pigmentation in the center of the lesion, and lavender patches and a few focally distributed punctate blood vessels were seen on the edge of lesion. Pathological examination showed scattered vacuolar endothelial cells, infiltration of lymphocytes and histocytes around blood vessels, and deposition of hemosiderin in papillary dermis.