Medical Definition of Perionychia

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Perionychia: An inflammation of the folds of tissue surrounding the nail due to infection. If caused by an infection, it may be bacterial (most commonly, staph or strep) or fungal in origin.

The word is composed of "peri-" meaning around or surrounding + the Greek word "onyx" for nail = around the nail.

Reviewed on 9/7/2018

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