Below are the main rubriks (i.e strongest indications or symptoms) of Nitric Acid in traditional homeopathic usage, not approved by the FDA.
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Shootings in ears.
Stitches in the (r.) ear.
Dryness in interior of ear.
Ulceration of mastoid apophysis.
Discharge from ears.
Excoriation behind ears, with itching and suppuration.
Obstruction of ears.
Hardness of hearing, esp. when relieved by riding in a carriage or in the cars, i.e., hears better (like Graphit.).
Hardness of hearing, principally from elongation, induration and swelling of tonsils (after the abuse of Merc Viv Mercury).
Clapping, throbbing, and rumbling in ears.
Echo in ears of one's own speech.
Cracking in ears during mastication.
Swelling of parotids.
Swelling of glands beneath and behind l. ear with stitches and tearing extending through the ear.
Wen on the lobe of the ear.
Beating and humming in ears.≡ more ...