Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Carbonicum in traditional homeopathic usage, not approved by the FDA.
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All troubles of external nose which may attain a morbid size - pimples and puffiness
Catarrh; bad smell of nasal secretion
Many troubles of external nose ( Causticum Caust.) Posterior nasal catarrh
hawking much mucus from throat; worse, slight draft.
Constant coryza; obstruction of nose≡ more ...