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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RECTUM, ANUS, STOOL
Bleeding after hard stool
Diarrhoea from juicy fruits or cider; during dentition
Green, slimy, HOT, sputtering, undigested, With fetid flatus
Fistula in ano, alternating with chest symptoms.≡ more ...