From your description, it doesn't sound as though you have anything wrong at all. It certainly doesn't sound like a fungus, and even if it were, advice to sleep naked doesn't make a lot of sense. Bumps that come and go don;t sound like a problem at all. I suggest that you show them to a doctor when they're there and haven't been picked at, etc. Most likely, you'll be advised to ignore them.
Best.
Dr. Rockoff
I would recommend avoiding yeast based white/brown flour foods (bread, crackers..etc) for a few weeks and see how you feel after that. Just check the ingredients in your food for yeast and look for flour alternatives like Spelt, Kamut.