Introduction
Tumors are known to occur under the nails, albeit rarely. Several studies on subungual tumors used ultrasound (US) and magnetic resonance image (MRI).1–4 However, these studies seldom mention subungual abscesses. Typically, reports of subungual abscesses are only available at the case report level,5–7 and US and MRI images of subungual abscesses are not available to the best of our knowledge; thus, imaging findings of such abscesses do not exist. Subungual abscess treatment has been effective with carbon dioxide (CO2) laser drainage and antibiotic administration. We have experienced a case of a subungual abscess that improved after manual drainage without antibiotics. Here we report US and MRI images of the subungual abscess before and after treatment.