Erythema Ab Igne

A 23-year-old woman, with a history of esophageal atresia status postsurgical correction and chronic abdominal pain on high-dose fentanyl, presented with increasing abdominal pain and a dark, net-like rash on her back. She reported that her pain was usually controlled with opioids, marijuana (one joint per day), and hot showers, but had recently worsened. She noted that the rash appeared 1 year prior and had faded and resurfaced during that...