I had a nasty fungal infection back of both legs (popliteal fossa). GP prescribed Clotrimazole (1%) but didn't work, then prescribed Daktacort (2%) but didn't work. So I took matters into my own hands, and with a bit of research bought a topical steroid cream (Betamethasone) and used daily for 5 days. It's almost gone now.
I would have paid for a private Dermatologist consultation, but they were booked up so far out in time I couldn't wait.