Below are the main rubriks (i.e strongest indications or symptoms) of Oxalicum Acidum in traditional homeopathic usage, not approved by the FDA.
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Dull headache of the vertex and forehead, heaviness.
Pain between the vertex and occiput, at a spot pressing inwardly.
Headache, worse after wine; lying down; after sleep and on rising; better after stool.
Compression in head, sensation as from a screw behind each ear.≡ more ...