I'm a big fan of tea tree oil (TTO) for its anti-microbial properties. I mix it into my chamois cream, and even have some TTO body wash for after rides (but I use it all the time 'cuz it smells so good!).

I'd probably dab some TTO on the sores to help them heal. But the old adage about "an ounce of prevention" rings true... Use chamois cream during rides (especially long ones) if you need it, change out of your shorts right away after rides, loose fitting clothes to "air things out" afterwards.

Feel better soon!