Have him go to a free clinic or one that works on a sliding scale. We can't diagnosis anyone and this is not related to a STD.
Maybe try posting in the dermatology community, they might be able to give a little more help. But any diagnosis needs to come from a Dr.
we have no ensurance and with a baby on the way finding help is extremly hard. we ruled out yeast infectins and another thing we are considering is egzma witch was somethiong my gyno haD suggested
Have him follow up with his Dr or see a dermatologist. It has nothing to do with a STD.