Below are the main rubriks (i.e strongest indications or symptoms) of Causticum in traditional homeopathic usage, not reviewed by the FDA.
FEVER AND CHILL
Chilliness predominating, frequently with coldness of the l. side.
Internal chilliness, followed by perspiration, without previous heat.
Nocturnal shivering, with pains in the back, and followed by general sweat.
Heat in the evening, from 6 to 8 p.m.
Flushes of heat, followed by chilliness.
Copious sweat while walking in the open air.
Nocturnal sweat, sometimes of an acid smell.
Morning sweat (smelling sour).≡ more ...