Below are the main rubriks (i.e strongest indications or symptoms) of Belladonna in traditional homeopathic usage, not approved by the FDA.
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BACK AND NECK
Back and neck
Sharp pains in the armpits.
Pain, as of dislocation; rheumatic and drawing pains in the back and between the shoulder-blades.
Furunculus on the shoulder.
Dartings, as if from knives, in the bones of the spine.
Gnawing in the dorsal spine, with cough.
Painful stiffness and cramp-like pains, in the sacral regions and in the back.
Painful swelling and stiffness in the neck and in the nape of the neck.
Painful swelling in the glands of the neck and in those of the nape of the neck.
Red and purulent pimples on the back and nape of the neck.
Veins in the neck swollen.
Sour sweat, only on the neck.≡ more ...