Hi there ~
I understand your concern. You should visit with a dermatologist
if it does not help to keep the area dry and clean because of your testicular swelling. It is easier to get a surgical opinion as it could easily be a problem with varicocoele of the testes which is causing this. I hope you give it a serious thought. It would be suggested to use local antiviral
cream as well. I am thinking that you might be able to get it over the counter i.e. acyclovir
cream. Also getting a screen for STDs would be helpful as I do not have your entire history. I hope this helps.
Take care and have a lovely day!