Researchers have found that UV-A and UV-B rays can damage fungal DNA. That’s a big deal—DNA damage means the fungus can’t reproduce. However, ringworm fungi have evolved to be surprisingly resistant to UV damage compared to other germs.
You’d need a professional-grade UV light therapy booth to get enough power. Your average backyard sunbath? Not even close. It’s like trying to pop a tire with a toothpick.
Also, ringworm often lives under the top layer of skin. UV rays have a hard time penetrating deep enough to reach the fungal roots. So the sun mostly just skims the surface—like a shallow apology that doesn’t fix the real problem.
