My rash is not going away. best relief is Desitin ,40% zin Ox, and kept dry, wont go away after 90 days. Don't know if its from Round up, poison oak or changing my 82 year old moms diaper. Is it fungus or what. No bumps just pink to red. Had it in my eyelids, finally went away after washing 3 4 times a day and adding anti foot fungus. Can round-up do this?