What is acne fulminans?

Painful, haemorrhagic pustules, friable plaques and large, necrotic, ulcerating nodules mainly on the back but may involve the chest, face, neck and shoulders • Association with systemic manifestations malaise, fever, chill, weight loss, diffuse myalgia, polyarthralgia, EN, hepatosplenomegaly, bone lesions, increased inflammatory markers (e.g. leukocytosis, neutrophilia, elevated ESR or CRP) and elevated LFT’s • Comedones are uncommon and polyporous comedones are absent • The condition typically occurs in individuals aged 13–16 years with a male to female ratio of 3:1