How to treat neck rash?

If it’s heat rash can use calamine lotion. I applied once and it’s kinda dry out next day so I didn’t apply anymore just let it slowly go away. Just use a very small amount will do.

Can consider changing body wash, wearing looser (or airy) clothings, keep the area dry and moisturised. I use Sudocrem when rash appears.

I use Kodomo Lotion Powder. works like a charm!