Here’s where it gets interesting. Sunlight can be a fungal enemy—to a point. Ultraviolet (UV) rays from the sun are known to kill many types of microbes, including some fungi. It’s like nature’s own disinfectant.
But here’s the catch: ringworm fungi are surprisingly tough. They laugh at a quick five-minute sunbath. For the sun to actually work, you’d need prolonged, direct exposure—and that comes with a big, red sunburn risk.
Think of it this way: sunlight is like a gentle rain on a campfire. It might dampen the flames, but unless you drench it, the fire will keep crackling. Ringworm laughs at gentle rain.