Although most cases of erythema ab igne are straightforward, some patients require a more in depth evaluation.


Failure to improve may be due to:

(1) misdiagnosis (livedo reticularis, etc)

(2) development of a secondary malignancy


Secondary malignancies that may develop at a site of chronic erythema ab igne include:

(1) squamous cell carcinoma

(2) Merkel cell carcinoma

(3) malignant lymphoma


Some patients develop erythema ab igne because of another underlying problem:

(1) chronic pancreatitis (use of a heating pad on the abdomen because of chronic abdominal pain)

(2) diabetic or other neuropathy (as a source of chronic pain and an inability to detect excessive heat exposure)

(3) cancer (use of heating pad because of chronic pain)

(4) other form of chronic pain


To read more or access our algorithms and calculators, please log in or register.