Red itchy bumps

[Erhiggins]

So about 8 months ago my son who is 9 broke out in a rash/bumps which started on his butt cheeks, moved to his legs (mostly around ankles) but still had bumps on his theigh too, then He had about 15-20 bumps on his stomach, back, arms and neck. So I took him to the dr and the  nurse practitioner diagnosed him with scabies. We treated him with the cream along with putting hydra Cortizone cream and Teatree oil all over his body. Within a week they went away. We had a follow up with his dr and we showed him the bumps (because we took pictures) and he said that wasn't scabies. Then in about a week my baby was getting bumps on his butt so I freaked out and took him to dr and they said that's just diaper irritation and deffinitly not scabies. It went away once we switched diapers. Well here we are now. He has the same bumps, same places, and itchy as ever. We took him to urgant care on Friday he only had bumps on his butt at this point and she said it was  folliculitis. She treated him with  an anabiotic and a cream. By Sunday the rash has spread all over his body butt, ankles  then there are few on his arms thighs stomach back and neck.  We took him to the hospital last night and the doctor there said it was just a viral rash that had to take it's course.  She said to continue the anabiotic and she also gave him a steroid to take. So we have Been putting on hydrocortisone cream,  giving him Benadryl,  continuing the anabiotic and also giving him the steroid. The rash is only getting worse and worse. Any ideas? I am not sure as to how to post pictures of it.

[Erhiggins]

Also need to mention that he has never had the bumps on his hands, feet or face as of yet.