Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Phosphoricum in traditional homeopathic usage, not approved by the FDA.
BACK AND NECK
Back and neck
Scrofulous swelling of lymphatic glands (S).
Weakness in back towards evening.
Slight pain in l. scapula.
Sharp pain in r. sacro-iliac joint. 21. Limbs.
R. wrist and l. ankle weak, ache as if paralysed (after menses).
Drawing in hands, feet, wrist-joints, and l. shoulder.
Crick in both sides of neck.≡ more ...