Dried Ginger Root, known as "Gan Jiang" in Traditional Chinese Medicine, is the dried rhizome of fresh ginger. It is not simply sun-dried but undergoes specific processing techniques. Compared to fresh ginger, its properties and effects undergo significant changes, as the saying goes, "Ginger gets spicier with age" and "Gan Jiang is stabilizing and non-dispersing."

Gan Jiang: It has a hot nature and a pungent taste. Its primary focus is "warming the interior"—warming the middle burner (spleen and stomach) to dispel cold and restoring yang to unblock the meridians. It is mainly used for deep-seated cold patterns and severe yang deficiency syndromes.

Main Functions and Efficacy of Gan Jiang

1. Warming the Middle Burner and Dispelling Cold (Core Efficacy)
   Meaning: Warms the spleen and stomach, dispels cold pathogens from the middle burner (spleen and stomach).
   Applications:

   • Cold and painful epigastrium and abdomen: A sensation of coldness and cramping pain in the stomach or abdomen, which can be relieved by applying heat or drinking warm water.

   • Vomiting and diarrhea: Vomiting of clear fluid or watery diarrhea caused by spleen-stomach deficiency-cold, with undigested food.

   • Spleen-stomach deficiency-cold syndrome: Chronic poor appetite, cold limbs, fatigue, and a preference for warm beverages.

2. Restoring Yang and Unblocking the Meridians (Key Emergency Efficacy)
   Meaning: Revives weakened yang energy and promotes the smooth flow of meridians. This is a potent function of Gan Jiang.
   Applications:

   • Yang collapse and desertion syndrome: Seen in critical conditions such as after severe illness, profuse sweating, or severe diarrhea, presenting with cold limbs, pale complexion, and faint or barely perceptible pulse. It is often used with Aconite (e.g., in Sini Tang), where Aconite warms kidney yang while Gan Jiang warms and stabilizes the middle burner, aiding in restoring yang energy.

3. Warming the Lungs and Resolving Fluid Retention
   Meaning: Warms the lungs and resolves cold fluid retention (thin, white phlegm) in the lungs.
   Applications:

   • Cough and wheezing due to cold-fluid retention: Coughing and wheezing with thin, white, frothy phlegm in large amounts, accompanied by chills and a cold sensation in the back. Commonly seen in conditions such as chronic bronchitis or emphysema belonging to cold patterns.

4. Warming the Meridians and Stopping Bleeding
   Meaning: By warming and unblocking the meridians, it helps stabilize blood and is used for bleeding due to deficiency-cold.
   Applications:

   • Bleeding due to deficiency-cold: Such as bloody stools or metrorrhagia (excessive or prolonged menstrual bleeding), with dark-colored blood accompanied by symptoms like aversion to cold and cold hands and feet. It often needs to be combined with other hemostatic herbs.

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