Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Phosphoricum in traditional homeopathic usage, not approved by the FDA.
yellow, creamy coating at the back part of the roof of the mouth
Canker sores of lip and cheeks
Blisters on tip of tongue, with stinging in evening
Thin, moist coating on the tongue
Thick, creamy membrane over tonsils and soft palate.≡ more ...