A felon is an abscess in the pulp of any digit and differs from abscesses located in the other parts of the body due to the anatomic compartments of the pulp. A simple infection can become complicated if neglected, mistreated, or immunosuppressed. Hyperbaric oxygen therapy (HBOT) has been used to assist wound healing for almost 40 years. The authors present a case of. a felon that was treated with a wound dressing and antibiotherapy for 6 weeks that did not heal, but healed after 6 weeks of treatment with the adjuvant HBOT.