Cinnamon’s main function is to tonify the fire to help Yang, dispel cold and relieve pain, etc. Cinnamon branch’s main function is to dispel cold and relieve symptoms, warm menstruation and Yang.
Cinnamon has the effect of tonifying fire to help Yang, dispersing cold and relieving pain, activating blood circulation and promoting menstruation, and it is suitable for treating kidney yang insufficiency, impotence and uterine cold, cold paralysis and lumbago, cold hernia and dolphin, cold condensation and blood stasis, dizziness and eye redness, cold pain in the heart and abdomen, menstrual pain and menstrual cramps, yin gangrene (a kind of slow condition of the Yin sore disease), and flow of injections (issued from the muscle in the deep part of the multiple abscesses), and so on.
Gui Zhi has the function of dispersing cold and relieving surface, warming menstruation and promoting Yang, and is suitable for the treatment of wind-cold surface symptoms, menstrual pain, cold-dampness paralysis, cold extremities (cold extremities, even to the elbows and knees), palpitation, phlegm (pathological products formed by the impaired metabolism of water and liquid), and dysuria (uncontrolled urination), etc. It should be contraindicated in febrile diseases with high fever and high temperature. It should be contraindicated in feverish diseases with high fever, yin deficiency and fire exuberance, and blood-heat paranoia.
The above herbs have cross-similar effects, such as dispersing cold, etc., and can generally be used in combination under the guidance of specialists.