The main symptom of
is a painful skin sore. Sores may begin as small bumps from an injury. However, a sore can grow up to 7.9 in (inches) (20 cm [centimeters]). The sores often have purple edges that look worn.
The doctor will ask about your symptoms and health history. A physical exam will be done. You may be sent to a skin doctor.
may be diagnosed by how it looks.
The doctor may want to rule out other causes of the skin sores. Tests may be done, such as:
Sample of fluids from the sores—to look for infection or causes of infection
Alavi A, French LE, et al. Pyoderma gangrenosum: an update on pathophysiology, diagnosis and treatment. Am J Clin Dermatol. 2017;18(3):355-372.
Pyoderma gangrenosum. DermNet New Zealand website. Available at: https://www.dermnetnz.org/topics/pyoderma-gangrenosum. Accessed March 2, 2021.
Pyoderma gangrenosum. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/pyoderma-gangrenosum . Accessed March 2, 2021.
Last reviewed March 2, 2021 by
EBSCO Medical Review Board
Marcin Chwistek, MD
Last Updated: 3/2/2021
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