Cinnamon Twig Decoction is indicated for Wind Cold invasion. When attacked by Wind Cold, the body's Nutritive Qi, if left vulnerable by weakened Protective Qi, is no longer capable of fulfilling its function of containing fluids, which leads to sweating. Open pores directly expose the individual to the external environment; and entry of Wind Cold impairs Lung Qi from regulating the body's skin and nose, resulting in nasal congestion. Dy heaves may also result when Protective Qi and Nutritive Qi are incapable of mutually regulating. It is also common for the individual to feel a natural sensitivity or aversion to drafts, tenderness, stiffness, and pain in the muscle layer - headache, and stiffness in the neck and shoulders.* (Kan Herb Company)