Calling all nasty-rash experts

[frannysf]

Did your brother get into some plant material where there might have been a nettle caterpillar? Rash sounds like what friends got who contacted the caterpillars while working in the yard. Rash came and went and came and went again. Took weeks to go away completely. Itched like crazy. The caterpillars are small, so they are not always seen, but their effect is toxic!