Efficacy of Ultraviolet B Phototherapy in the Management of Resistant and Relapsing Tinea Corporis and Tinea Cruris

Inclusion Criteria: * Adults aged ≥18 years. Both sexes. Clinical diagnosis of tinea corporis or cruris. Failure of ≥4 weeks of systemic antifungal therapy (e.g., terbinafine or itraconazole). No antifungal (topical or systemic) or corticosteroid treatment in the 2 weeks preceding enrollment. Recurrent infection (≥2 relapses in the past 6 months) Positive KOH microscopy and culture at baseline Exclusion Criteria: * Photosensitivity disorders or photosensitizing medications. Xeroderma pigmentosa, LE or other photosensitive dermatoses. dermatomyositis. Other skin conditions (psoriasis, eczema, etc.). Known autoimmune diseases, immunosuppression, or coagulopathies..