Nothing is more irritating than having to deal with a red, sore rash on your baby's chin and neck caused by excess saliva. Here's how to cure and prevent saliva rashes. Rinse the affected area with warm water. Dry the area with a gentle towel by dabbing. Apply a generous coating of Eucerin Cream (a cream that is intended for dry skin, quite thick and comes in a white jar). Do not use a simple lotion because it is too thin. You need the cream to heal and protect the affected area. Repeat step 3 each and every day morning and before bedtime until rash disappears. After rash is gone, apply thin coating each morning to prevent rash from re-emerging.