Below are the main rubriks (i.e strongest indications or symptoms) of Calc phos in traditional homeopathic usage, not approved by the FDA.
BACK AND NECK
Back and neck
Pains and aches between, and mostly below, the scapulae.
Violent pain in the region of the kidneys when lifting weight, or when blowing the nose.
Curvature of spine to left, lumbar vertebrae bend forwards.
Violent stitch at a small spot between left ilium and sacrum, from the slightest motion.
Soreness in the sacro-iliac symphysis.
Rheumatic pain and stiffness of the neck, with dulness of the head; from slight draught of air.
Cramp-like pain in neck, first one then the other side.≡ more ...