Objective　To investigate diagnostic methods and treatment of subcutaneous fat necrosis in neonate (ScFN). Methods The clinical data of a case with ScFN was reported and the etiology, pathogenesis, and differential diagnosis were reviewed. Results The case was a 2 days female newborn delivered via cesarean section at full-term, and she came to hospital because of indurated nodules and plaques in the back and shoulders. Anti-infection treatment after admission was not effective. On the 10th day in hospital, the back lesions appear as soft and fluctuant and then diagnosed as ScFN by biopsy which showed a small amount of inflammatory cell infiltration and fatty degeneration. The patient was followed up with good prognosis. Conclusions ScFN is a benign self-limiting fat disease, mostly occurred in the first four weeks of full-term newborns with history of abnormal childbirth.