Below are the main rubriks (i.e strongest indications or symptoms) of Calc phos in traditional homeopathic usage, not approved by the FDA.
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Sore pain; drawing, rending, tearing in the bones of the skull, most along the sutures of the skull, particularly between the frontal and parietal bones, or around the temporal bones,
Headache on top of head, behind ears, with a drawing in muscles of the neck to the nape of the neck and back of head,
Headache in the afternoon, with dread of labor; some pressure on both side towards the back; just the same in the open air, relieved for awhile after supper, though continuing somewhat during the evening (crude),
Stitching pain in left side of head; sleepiness during day,
Throbbing headache through both sides, most after quick motion,
Headache over forehead, with a tearing pain in the hands and arms, most in wrists and right middle finger,
Headache worse from changes of weather, extending from the forehead to nose, from temples to jaws, with some rheumatic feeling from collar-bone to wrists,
Aching, drawing pains around the lateral protuberances of the occiput,
Scalp sore, hurts; creeping, numbness, cold crawl; coldness on occiput, head,
Tight feeling; tension in scalp of forehead,
Itching on the scalp provoking scratching, for several evenings (crude),
Crawling sensations run over top of head, as if ice were laying on upper part of occiput; the head is hot, with smarting of the roots of the hair,
Affections of the skull,
Parietals.≡ more ...