Pyoderma Gangrenosum: Symptoms, Causes, Treatment
تقيح الجلد الغنغريني
Pyoderma gangrenosum is a rare inflammatory disease causing painful, sometimes rapidly enlarging ulcers. Despite its name, it is not primarily a bacterial infection and needs specialist assessment.
What is Pyoderma Gangrenosum?
A small bump may become an ulcer with an inflamed or purple edge. Skin injury or procedures can worsen lesions, a reaction known as pathergy.
Related reading: Ulcerative colitis as a possible associated condition.
Symptoms
Severe pain, enlarging ulceration and discharge may occur, commonly on legs or around wounds or stomas. Early pain may seem disproportionate to the lesion’s size.
Causes
Abnormal immune activity is involved. Associated conditions include inflammatory bowel disease, inflammatory arthritis or blood disorders, although no associated illness is found in some cases.
Risk factors
Inflammatory or blood disorders and ulcers worsening after trauma raise suspicion. The condition is not contagious and does not automatically indicate poor hygiene.
Diagnosis
Diagnosis combines appearance, history, biopsy and appropriate tests to exclude infection, vasculitis or cancer. A wound swab or photograph alone cannot establish it.
Treatment
Gentle wound care, pain management and anti-inflammatory or immunosuppressive treatment are selected by severity. Secondary infection is treated when present; antibiotics alone do not address the underlying inflammation.
Complications
Scarring, secondary infection, persistent pain and impaired mobility may occur. Recurrences are possible, and treatment requires monitoring for adverse effects.
Prevention
Avoid manipulating ulcers and inform clinicians before skin procedures. Wide surgical debridement can worsen active disease; specialists decide whether and when an intervention is appropriate.
When to see a doctor
Rapid ulcer expansion, severe pain or fever needs urgent review. Do not self-start steroids because infection can look similar and requires different treatment.