Paronychia is a common infection of the tissue surrounding the nail. One of the most common infectious pathogens of paronychia is Staphylococcus aureus. However, recent studies have shown that Staphylococcus lugdunensis, a normal skin flora which had been considered nonpathognomic, can also induce skin and soft tissue infection. Herein, we report a rare case of subungual abscess caused by S. lugdunensis. A 72 year-old-male presented with three days of throbbing pain in the right distal thumbnail. However, periungual erythema or swelling was not prominent. Dermoscopic examination showed a yellowish structureless pattern under the proximal nail plate. The abscess was then treated successfully with decompression using a CO₂ laser. In this report, we present a rare case of paronychia caused by S. lugdunensis. Decompression using a CO₂ laser can be a useful technique for managing subungual abscess.