Below are the main rubriks (i.e strongest indications or symptoms) of Mercurius Corrosivus in traditional homeopathic usage, not approved by the FDA.
BACK AND NECK
Back and neck
Pains in head, back, and limbs; kidneys affected.
Pott's disease; lies on back with legs drawn up.
Tonic cramps; tension in l. scapula; tearing. 21. Limbs.
Coldness in extremities, they look purple, with small, spasmodic, frequent pulse.
Rheumatic pains after gonorrhoea suppressed by Copaiva Officinalis Copaiva.
Paralysis in all limbs; trembling.
Glands of neck hard and swollen.≡ more ...