Acne Fulminans

Acne fulminans is a rare and severe form of acne. It causes a sudden breakout of painful, swollen nodules on your skin. This condition most often affects males between ages 13 and 22 who are going through puberty. It’s linked to high levels of testosterone in your body.

It’s a type of acne conglobata. This is another severe form. Acne conglobata causes deep bumps that join under your skin. These form large cysts. In acne fulminans, the bumps are also deep and painful, but they usually don’t join together.

Acne fulminans can be especially frustrating because typical acne treatments don’t work. Early care is important to limit skin damage, reduce scarring and support your physical and emotional well-being.

Acne fulminans signs and symptoms

You may notice a sudden outbreak of very inflamed acne that’s:

• Painful and tender
• Made up of swollen lumps under your skin
• Red, purple or darker than your natural skin tone
• Large and spread over one area of skin
• Likely to break open, bleed or leak fluid
• Slow to heal and may form crusts or scabs

You may also have other symptoms, like:

• Fever
• Joint pain
• Muscle pain

Acne fulminans most often affects your:

• Back
• Chest
• Face, like your cheeks and forehead

Acne fulminans causes

Acne fulminans happens when your immune system reacts too strongly to severe acne. 

The tiny openings that hold hair and oil (hair follicles and oil glands) can become very swollen and break open. When this happens, inflammatory acne material spills into your surrounding skin. Even though acne bacteria normally live on your skin, acne fulminans isn’t caused by an infection. Instead, your immune system overreacts to these acne-related substances.

Because the inflammation is so severe, acne can quickly turn into painful open sores that bleed or ooze. Healing can take longer, and without quick treatment, permanent scarring is more likely.

Common triggers of acne fulminans include:

• Certain medications, like some antibiotics or immune-related drugs
• High levels of testosterone
• High-dose isotretinoin for severe acne
• Use of anabolic steroids

Risk factors

This condition can affect anyone. But certain factors may raise your risk. You might be more likely to develop it if you:

• Are a teen or young adult
• Are male
• Had acne for several years before symptoms suddenly got worse
• Have certain rare inflammatory or genetic conditions that affect your immune system
• Have a family history of severe acne
• Have higher testosterone levels
• Have an immune system that reacts strongly to skin inflammation
• Use anabolic steroids

Complications

Acne fulminans can lead to serious complications because of how intense and sudden the inflammation is. Common complications may include:

• Deep skin damage: Painful nodules can quickly turn into open sores that bleed, ooze or form thick crusts.
• Emotional stress: Severe acne and scarring may affect self-esteem, mood and your mental health.
• Ongoing pain and discomfort: Severe inflammation can make daily activities uncomfortable or difficult.
• Permanent scarring: As your skin heals, it often leaves deep or visible scars, especially on your chest, back and face.
• Skin infections: Open sores raise the risk of infection while healing.

You may need hospital care, especially if you have strong, body-wide symptoms. This allows for close monitoring and faster relief.

How doctors diagnose acne fulminans

A healthcare provider will diagnose this type of acne mainly by looking at your symptoms and asking how quickly they started.

During the visit, your provider will closely examine your skin. They’ll ask about your acne history, including whether your symptoms worsened quickly or didn’t respond to usual treatments.

Next, your provider will check for symptoms that affect the rest of your body. They may ask if you’ve had a fever or any pain. They’ll also look for physical signs that suggest widespread inflammation.

Your provider may order blood and culture tests to check for signs of inflammation or infections in your body. If you have joint pain, imaging tests may look for inflammation.

Acne fulminans treatment

You don’t treat acne fulminans the same way as regular acne. Your provider may first focus on calming the inflammation, then slowly treating the acne to protect your skin and prevent scarring.

Here’s what your treatment plan might look like:

• Calm inflammation and reduce swelling and pain with oral corticosteroids like prednisone or prednisolone.
• Let painful, open sores heal as inflammation gets better.
• Treat the acne carefully with isotretinoin (an Accutane®-type medicine), starting at a very low dose and increasing slowly under close supervision.

If you can’t use steroids or isotretinoin or they don’t work well, providers may consider other medicines that reduce inflammation. These may include:

• Dapsone (especially if painful lumps called erythema nodosum are present)
• Methotrexate
• Azathioprine
• Cyclosporine
• TNF inhibitors
• Photodynamic therapy (PDT)

These treatments may help in specific cases. They require close medical supervision.

Skin care and scarring support

Gentle cleansing and wound care help protect your healing skin. After the condition improves, providers may recommend treatments to reduce scarring — like prescription creams, laser therapy or other procedures.

Early treatment matters. Starting the right care quickly may help manage symptoms, protect your skin and lower the risk of permanent scars.

When should I see my healthcare provider?

See a healthcare provider if you:

• Notice signs of severe acne or acne that doesn’t go away
• Have new or worsening symptoms
• Have severe pain, swelling or pus coming from acne sores
• Want guidance on ways to reduce scarring after your skin heals

What can I expect if I have acne fulminans?

Acne fulminans often starts suddenly and can worsen quickly, so it’s important to see a healthcare provider as soon as symptoms don’t improve with usual acne treatments. A provider or dermatologist will guide your care and help manage the inflammation. 

Treatment can take several weeks to months before your skin improves. After acne heals, you may notice scarring or changes in skin color, like lighter patches.

Acne can also affect how you feel about yourself. It’s common to feel upset, embarrassed or want to avoid social situations. If these feelings become overwhelming, talking with a mental health professional may help you cope and feel more supported during recovery.