Abstract: A male patient of seventy was diagnosed as bullous pemphigoid 11 months ago in another hospital and then treated with "methylprednisolone and cyclosporine" for a long time. There were multiple dark red nodules and ulcers on both of his forearms and hands for more than half a month. It was confirmed as Alternaria by fungal microscopic examination and culture of skin ulcer necrosis. Finally, the lesions basically disappeared after voriconazole treatment.

Key words: alternariosis, bullous pemphigoid, skin infection