It’s been there for a month… some days getting better some days getting worser… Help!

Tried applying lotion and the diaper rash cream but Ntg seems to help. anyone experience befor3? Edit: I didn’t bring him to go see a doctor for so long because when it Js started I texted his Pd and their clinic nurses said it’s ntg serious…only suggested for me to moisturised his face. couldn’t tahan anymore so I brought him to go see our house nearby clinic turns out it’s some saliva issue? Doctor gave a cream and it’s all good now. Thanks All