Where can i get a neomycin allergy test for my child?

Patch test: You can test skin products that could cause local skin reactions using a patch test. Place a dab of any skin product on the pad of a bandaid & place it on a place the kid won't mess with, like the back. You can check the site occasionally for any reaction & remove it after 24hrs. If no redness or blistering occurs at the site, its probably ok to use on the kids skin.