In TCM, this concern is differentiated into several patterns, each with a classical herbal formula:
Formula: Shaoyao Gancao Tang (Peony and Licorice Decoction) — from *Treatise on Cold Damage*
Formula: Danggui Sini Tang (Angelica Frigid Extremities Decoction) — from *Treatise on Cold Damage*
Formula: Shao Gan Mu Gua Tang (Peony, Licorice and Chaenomeles Decoction)
These formulas are for reference under TCM syndrome differentiation and should only be used under the guidance of a qualified practitioner.
The liver governs the sinews, and the spleen governs the muscles and limbs. Liver-blood insufficiency with yin-blood depletion may fail to nourish the sinews, which is associated with spasms; or blood deficiency combined with cold pathogen may be associated with contraction of the channels. Attacks are more common at night. Triggers may include catching cold at night, overfatigue, salt loss through sweating, and calcium deficiency.
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