Fegeler syndrome, also known as acquired port-wine stains (PWS), is rare skin disease that occurs after age. It is morphologically the same as congenital PWS in well-demarkated, bright red to purple colored macules or patches. While most of congenital PWS are located on the head-neck, acquired PWS can occur on anywhere. In literature, various causes such as trauma, hormone, thermal damage, and solar damages may contribute to the development of acquired PWS. Acquired PWS also shows identical features on histopathologic characteristics to congenital PWS by dilatation of capillaries in the upper dermis with normal endothelial cells. We report here a 28-year-old female presented with acquired PWS on the right hand dorsum, and right forearm. The lesion appeared after a cast due to sprain in 6-year-old. Histopathologic analysis of a biopsy specimen reveals a reasonable finding for PWS. We recommended pulsed dye laser therapy, however she didn’t want to receive treatment. To our knowledge, there are some case reports about acquired PWS in literature. However, this is a rare case for acquired PWS caused by minor trauma and first report in Korean literature.