Superficial fungal infections (SFI) are common diseases affecting the skin, hair, nails, and mucosal membranes . They are often caused by dermatophytes and yeasts, e.g . Trichophyton, Candida, and Malassezia1 . Hidradenitis suppurativa (HS) is a chronic, inflammatory skin disease of the intertriginous areas associated with minor infections2, peripheral vascular disease, diabetes, and smoking3, the last three of which are risk factors for the development of SFI4 . Despite this, and the anatomical overlap between HS and types of SFI e.g . intertriginous candidiasis and tinea cruris, the possibility of an association between HS and SFI has never been investigated.