Acne fulminans is a sudden, severe form of acne with painful, bleeding, ulcerating nodules and plaques on the face, chest and back. Fever, fatigue, loss of appetite, weight loss, muscle pain or joint pain with that eruption means the person needs urgent medical evaluation. The disorder most often affects teenage boys and young men with prior acne, especially ages 13 to 22. Rapidly worsening ulcerated acne plus fever or joint pain needs same-day dermatology or emergency care.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What does the skin eruption look like?
- Which body-wide symptoms need urgent care?
- Who is most likely to develop it?
- How do doctors evaluate the illness?
- What should you do when acne turns ulcerative and painful?
What does the skin eruption look like?
The outbreak starts abruptly. Painful nodules and plaques break open, bleed and form crusts. According to StatPearls, the lesions favor the face, chest and back and often leave scars, as described in the StatPearls review.
Crusting and bleeding separate it from common acne. The sores can join into raw, oozing areas. Pain is often strong and out of proportion to prior acne.
Which body-wide symptoms need urgent care?
Fever, malaise, fatigue, weight loss and loss of appetite commonly occur with the skin eruption. These signs point to whole-body inflammation, not a simple breakout.
Joint and bone symptoms also occur. They include aching joints, muscle aches, swollen painful joints, bone pain and bone lesions of the sternum, collarbone or spine, noted in a conference handout from the American Academy of Dermatology in the AAD meeting handout.
- fever, chills, tiredness or rapid weight loss
- painful, swollen or stiff joints
- muscle aches or bone pain
- fast-spreading ulcers that bleed and crust
Who is most likely to develop it?
Most cases occur in adolescent males ages 13 to 22 who already have acne vulgaris. Onset may follow anabolic steroids, testosterone or starting high-dose isotretinoin.
Not every severe breakout is acne fulminans. A similar ulcerating acne without fever, joint pain or other body-wide signs is classed separately as pseudo-acne fulminans.
How do doctors evaluate the illness?
Diagnosis is mainly clinical, based on the sudden ulcerating eruption plus systemic signs. There is no single blood test that confirms it.
Blood and urine tests may show high white cells, anemia, raised ESR or CRP, protein in urine and blood in urine. Other severe associations include red tender leg lumps, enlarged liver or spleen, joint inflammation without infection and sterile bone lesions that mimic infection, listed in the Medscape clinical overview. These findings help show the extent of systemic inflammation.
What should you do when acne turns ulcerative and painful?
Do not wait to see if standard acne antibiotics will work. Usual antibiotics fail in this disease, and care needs systemic corticosteroids plus specialist-managed isotretinoin, as summarized in the PubMed summary of the American Journal of Clinical Dermatology review.
Seek same-day dermatology or emergency care for ulcerated acne with fever or joint pain. Bring a list of recent acne drugs, steroids, testosterone and supplements. Ask where to go for urgent follow-up if pain, swelling, fever or new ulcers increase.