Dodging gym bugs - it's a real workout [news]
Lurking in the shower tray are fungal infections, waiting keenly for something to latch on to. A toenail is perfect, as is that spongy foot skin.
That itch between your toes? Best you have a closer look. Maybe you had the smallest little cut on your foot you hadn't even noticed. Then you walked barefoot around the gym changing room or in the sauna, and voila, warts.