Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Carbonicum in traditional homeopathic usage, not approved by the FDA.
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BACK AND NECK
Back and neck
Rigidity of the nape.
Hard swelling of thyroid gland.
Goitre; pain, pressing.
(Goitre decreased in size.).
Boring pain in tip of l. scapula; extends to point of ensiform cartilage.
Pain, as from excoriation, in sacrum.
Lancinations in sacrum when seated.
Backache; violent pain in small of back after walking.
Tingling in back.
Cracking of the cervical vertebrae when moving head.
Swelling in glands of neck.
Drawings and cramp-like tension in back and nape of neck.≡ more ...