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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One's speech echoes in the ears.
Cracking in the ears when masticating.
Hardness of hearing, from induration and swelling of tonsils; after abuse of Merc Viv mercury.
Eustachian tubes obstructed.
Terribly offensive, purulent otorrhoea.
Throbbing in the ear.
Auditory canal nearly closed.
Caries of mastoid process.
Beating, humming in the ears.≡ more ...