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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Rheumatic pain on shoulder, arms and elbows, with weakness of arms.
Twitches and twitching sensation in arms and fingers on taking hold of anything.
Cutting pain in hands.
Trembling of hands, morning.
Contraction of fingers.
Swelling of hands in afternoon.
Warts painful to touch.
Tetter on dorsa of hands; skin dry and chapped.
Tearing and bruised pain in right hip. θ Dysmenorrhoea.
Heaviness of legs and feet with tension in them when sitting or walking.
Tension in bend of knee; the muscles are shortened.
Cramp of the calves.
Blotches (as in lepra) on the legs.
The lower legs are swollen, inflamed, red and covered with ulcers.
Cutting pain and cramp in feet.
Swelling of feet and soles of feet, with stinging in them when walking or stepping on them.
Easy dislocation and spraining of ankle; the ankle is so weak that it gives way; foot bends under when stepping on it.
Black ulcerated pustule on the heel.
Ulcer on the heel, arising from spreading blisters.
Smarting and soreness between the toes.
Swelling, tearing and soreness in (big) toes, preventing sleep.
Blisters on the points of the toes, as if scalded.
Boring, drawing and stinging in the corns.
Cold feet.≡ more ...