Below are the main rubriks (i.e strongest indications or symptoms) of Nitric Acid in traditional homeopathic usage, not approved by the FDA.
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 ...