Does anyone know what this is on my 10 month old lg

[Brosex]

Does anyone know what this is on my 10 month old lg

No photo has come up?

This is it

Has she been in her car seat recently?

I originally thought it was her pram or car seat but it doesn’t seem too be fading it’s just staying there so I don’t think it’s that x

Bit of sudocreme on it and see if that helps

Ringworm? I’d pop to see the pharmacist or your health visitor