I had a rash in between my breast and I just pat it dry after a bath and used E45 and it went away, however I would go to a pharmacy just to get it checked, hope you get sorted
I had this too and it smelt so weird, like a strong vinegar 🤣. I put lots of sudocrem on and it soothed it and cleared it up.
I had it on my stomach try medical baby powder i got mine at Walmart it helps with the itching
I have this, I've been using hydrocortisone cream and it's helped it. But I may need to see the GP if it doesn't completely clear up. Might have to try the sudocream trick as suggested above.
Definitely go see your GP!