Below are the main rubriks (i.e strongest indications or symptoms) of Mercurius Corrosivus in traditional homeopathic usage, not approved by the FDA.
Ear seemed stopped,
Sticking within the left ear (fifth day),
Pulsation in the left ear, as if caused by an artery (seventh day),
Violent pulsation in the ears, especially in the left (eleventh day),
(Frequent roaring and humming in the right ear, which he usually has, very much increased), (fifth day),
A whirring in the left ear rhythmical with the pulse,≡ more ...