A 54-year-old man with a history of diabetes on metformin comes to the hospital complaining of 2 weeks of dry cough and 2 months of a bilateral leg rash, The rash is not painful but it is pruritic, and is gradually getting worse. An OTC antifungal cream has not helped. The areas affected are mostly on the feet, shins, and calves.
The patient denies any fever or any exposure to new foods, detergents, medications, or skin care products. He also denies chest pain, shortness of breath, leg swelling, or other.
