5How to Diagnose Erythema Nodosum
There are different ways to diagnose erythema nodosum. In most cases, the lesions are quite easy to notice due to their distinct appearances. Your doctor may make a diagnosis just by looking at these lumps. They may also need a physical exam and want to know your medical history to determine which condition may cause erythema nodosum. A biopsy would be done to make sure that the lesions are benign and rule out other diseases that may cause inflammation. When the cause is not clear, X-rays or blood tests may help identify other causes of the lumps. A precise diagnosis is very important to making a proper treatment plan. [6]
