What can this be ?

[Toomanydishes]

Hello all,

I've been struggling with a rash on my neck for a while now.
At first I've put it down to using Retinol and my sensitive skin reacting to it , but I feel like it's more than that- I've had it even when not using it.

It comes and goes, seems to pop up if I sweat, especially at night , I just wake up and my neck is irritated.

Anyone knows what it might be or dealt with something similar ?

Sweat rash?

@whatabeautifulwedding , you might be right, thank you!
Do you know -would sweat rash go away once the skin is dry and cool? Mine doesn't , it takes a few days

My only knowledge is that an ex boyfriend used to get sweat rash from sport and it also took a few days to disappear.