A fungal infection called Trichophyton indotineae, which originated in Asia, is rapidly spreading throughout the United Kingdom and becoming resistant to common antifungal treatments. The infection typically starts in the groin area and can spread to other parts of the body, and many cases fail to respond to standard antifungal drugs like terbinafine. Researchers tracked 157 cases over seven years and found the fungus now accounts for over a third of all dermatophyte infections sent to the UK reference laboratory. Doctors and laboratory professionals are being urged to recognize this emerging threat and consider better diagnostic and treatment strategies.