Abstract:The patient, a 42-year-old male, with a history of hepatitis B and membranous nephropathy, had intermittent fever and chills 12 days before admission. In the first 2 days after admission, the patient’s condition aggravated with redness, swelling and pain in the left scrotum and perineum. Immediate surgical debridement was performed. The patient had a persistent low fever, with blood and pus cultures showing Candida albicans positive, thus was diagnosed fungal necrotizing fasciitis and pyomyositis. The patient was treated with echinocandins mica-fungin (150 mg, qd) for antifungal infection, and was given encroaching dressing change, hyperbaric oxygen therapy, nutritional support, etc. Two months after surgery, the patient’s condition improved and he was discharged. The early clinical symptoms of necrotizing fasciitis and pyomyositis caused by Streptococcus spp. infection lack specificity, thus are prone to be delayed. For patients with concomitant immune diseases, attention should be paid to the prevention and early treatment of complex infection. The appropriate selection of empirical antifungal agents at the early stage has clinical significance.