Drool rash tips?

Danielle 💜 • 💍 JACK 09.08.18 👶🏻 LILY 12.20.19 💊 HG SURVIVOR

My girl has had a drool rash on her neck for a couple weeks now and I dont know what to do anymore. I'm going to make a doctor app but jm wondering If anyone has any tips or advice? I've tried exema cream, petroleum jelly, zincofax, baby oil...everything. I put socks on her hands to stop her itching because she has itched them raw before 😓 help!!