Sleeping on stomach…rash?! Blister?! Pic attached

Hey all! So my 6 month old girl started a month ago I believe sleeping on her stomach (lay her down on her back immediately rolls to tummy to sleep). She moved around A LOT in her sleep and before she actually settles enough or gets comfy to sleep lol. And idk I guess maybe she drags her face alone the bed sheet too much? Or when she’s crying she moves her face on the crib sheet? Maybe even because she doesn’t have much arm control so when she’s crying scoots toward one side of the bed she rubs her face on it? She also drools a lot so there’s that too. I truly do not know. But she has like a rash/blister on both sides of her face in her cheeks and I don’t know what to do to help that? It doesn’t seem painful or anything but I don’t think it’s good either?! Idk does this happen to anyone else’s baby? Or is mine just a menace when it comes to being in her crib?! I just don’t think it looks all that comfortable and I feel bad for her poor cheeks…and it’s kind of drying out her face. In the picture her nose is red from crying. But looking at her cheeks from a side angle it definitely looks more blistery…