You should really ask a doc to make sure "what" it is.
Our pediatrician looked at my girls skin and told us it was: keratosis pilaris
"Keratosis pilaris occurs when the human body produces excess amounts of the skin protein keratin, resulting in the formation of small, raised bumps in the skin often with surrounding redness. The excess keratin, which is the color of the person's natural skin tone, surrounds and entraps the hair follicles in the pore."
If you do research on this topic you will find that a good exfoliating soap will remove the excess keratin from the top of the skin and lots and lots and lots of moisturizers will keep the skin soft and supple around the pores where the keratin comes out. So it keeps it from crusting over and then piling up from the underneath side of the skin. That's what makes the red inflamed looking areas. The pores are clogged with the dried up humps on top of the pores.
I bought a Dial soap for bumpy skin. I love how it makes my facial skin feel so I got one for me too. I do NOT use it every day because I have typically dry skin. But now that I use the Dial soap a couple of times per week I feel like my face is nicer overall.
When my girl doesn't use it I can see a difference in her face. If she uses a facial moisturizer afterwards her skin will stay nice looking for a couple of days. She doesn't use the soap every day either. She cleans her face with the special Dial soap every other day, in the shower so it's rinsed really really well.
I bought a very very soft buff puff for her face too. The all white ones that are very scratchy will not be good for her face. It will scratch it all up and make it worse. The one I got has a light green/aqua layer on one side. It's very nice. That's what I bought for my face too. She rinses her's out and lays it on top of the soap dish with that Dial soap in it. That way it's not down in the tub or in the soap dish where it will get used for other stuff.
She hasn't had Backne yet but if she starts breaking out there too then I will help her wash her back.
There are many many different products on the market for "bumpy skin" and that's a lot to get through. I picked Dial because it has the same ingredient that I've seen in most of those others. Salicylic acid. Plus it's a name brand. I picked the bar soap so she's use it in the shower. The pump would be used by all the kids for hand washing if it had been on the sink.
http://www.dialsoap.com/line/dial-acne-control,
https://en.wikipedia.org/wiki/Keratosis_pilaris
.