Below are the main rubriks (i.e strongest indications or symptoms) of Ferrum Met in traditional homeopathic usage, not approved by the FDA.
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BACK AND NECK
Back and neck
Tearing (paralytic) between the shoulder-blades at night, into the upper arm (l.); he cannot raise the arm; slow movement improves it gradually.
Shootings in the shoulder-blades on moving the arms.
Stiffness of the muscles of the neck, with pain during movement.
Swelling of the glands of the neck.≡ more ...