What are the functions and effects of Cinnamon Twig (Guizhi)?
Generally speaking, the effects and functions of Guizhi (Cinnamon Twig) include inducing perspiration to relieve exterior syndromes, warming and unblocking the meridians, assisting yang and transforming qi, harmonizing the stomach and resolving dampness, and anti-inflammatory and analgesic effects. Detailed explanations are as follows:

1. Inducing Perspiration to Relieve Exterior Syndromes
Guizhi has the effect of pungent warmth and dispersing action, and can be used to treat symptoms such as exogenous wind-cold syndrome. Moreover, Guizhi can promote blood circulation and increase blood flow to the skin, thereby inducing perspiration and helping to relieve symptoms such as colds and cough caused by wind-cold.
2. Warming and Unblocking the Meridians
Guizhi has effects of dispersing cold with its pungent and warm properties, warming and unblocking the meridians, and relieving pain by warming the channels. It can dilate blood vessels and improve circulation, thus alleviating conditions such as rheumatoid arthritis, lumbago due to muscle strain, dysmenorrhea, and other symptoms caused by cold stagnation. At the same time, Guizhi can also treat disorders caused by blood stasis, such as abdominal masses and accumulations.
3. Assisting Yang and Transforming Qi
Guizhi can both warm and support yang energy and promote its circulation. It can be used to treat chest obstruction syndrome caused by insufficient heart yang and blocked heart meridians, manifesting as chest pain radiating to the back, chest tightness, and palpitations. It can also treat phlegm and fluid retention syndrome caused by deficient spleen yang, impaired transformation and transportation functions, and internal retention of dampness.
4. Harmonizing the Stomach and Resolving Dampness
Guizhi also has the function of harmonizing the spleen and stomach and eliminating dampness. It can improve symptoms such as indigestion and stomach pain and has a good regulatory effect on patients with weak spleen and stomach function and poor appetite.
5. Anti-inflammatory and Analgesic Effects
The volatile oil component in Guizhi has certain anti-inflammatory and analgesic effects. It can be used to treat diseases such as oral ulcers and toothaches, thereby relieving pain and discomfort caused by inflammation.
In daily life, Guizhi can be taken orally by decoction in water, but should not be boiled for too long to avoid excessive loss of volatile oil components. It can also be ground into powder or taken in pill or powder form, though usage should follow medical advice. At the same time, dietary adjustments during medication are beneficial to recovery.