Below are the main rubriks (i.e strongest indications or symptoms) of Causticum in traditional homeopathic usage, not approved by the FDA.
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Left-sided sciatica, with numbness
Paralysis of single parts
Dull, tearing pain in hands and arms
Heaviness and weakness
Unsteadiness of Muscles of forearm and hand
Numbness; loss of sensation in hands
Cannot walk without suffering
Rheumatic tearing in limbs; better by warmth, especially heat of bed
Burning in joints
Slow in learning to walk
Unsteady walking and easily falling
Restless legs at night
Cracking and tension in knees; stiffness in hollow of knee
Itching on dorsum of feet.≡ more ...