Dang Gui Si Ni Tang (Dang Gui Four Reversal Decoction)

Dang Gui Si Ni Tang is a classic formula in Traditional Chinese Medicine (TCM) used when someone has very cold hands and feet because their vital energy and blood circulation are too weak, and cold blocks the channels. The core idea is to gently warm the body from the inside, nourish the blood, and open up the circulation so warmth can reach the extremities again.

What is Dang Gui Si Ni Tang?

In traditional wording, this formula is summarized as: “Dang gui si ni yong gui shao, xi xin tong cao gan da zao; nourishes blood, warms the channels, opens the vessels; works when blood is low and cold causes icy extremities.” In modern health language, it means this formula is designed for people whose blood and vital energy are too weak, so cold settles into their vessels, blood doesn’t move well, and warmth cannot reach the hands and feet.

When someone is naturally low in blood and energy, and their vessels are invaded by cold, that cold can congeal and slow down circulation. The body’s warming yang energy can’t reach the tips of the fingers and toes, and the nourishing blood can’t fully fill the vessels. This shows up as icy hands and feet and a very thin, almost disappearing pulse. Here, “cold hands and feet” mainly means the palms to the wrists and the soles to the ankles feel cold to the touch. It is different from a more severe situation where the whole arms and legs feel completely reversed and lifeless.

How the Formula is Put Together

Dang Gui Si Ni Tang is based on the classic formula Gui Zhi Tang, but removes fresh ginger, doubles the amount of jujube, and adds Chinese angelica (dang gui), rice-paper pith (tong cao), and asarum (xi xin). Each herbal ingredient has a specific role in warming, nourishing, and supporting circulation:

• Chinese angelica (Dang gui): Gently warm and deeply nourishing, used to build and regulate the blood so circulation improves.
• Cinnamon twig (Gui zhi): Warm and spicy, it warms the channels, disperses cold, and helps open the blood vessels so warmth can move through.

These two together are considered the main ("chief") herbs, focusing on warming the vessels and nourishing the blood at the same time.

• Asarum root (Xi xin): Warms the channels and scatters cold, helping cinnamon twig to open the vessels and move warmth outward.
• White peony root (Bai shao / Shao yao): Nourishes blood and supports the body’s nutritive aspect, working with Chinese angelica to replenish and harmonize the blood.

These are the supporting ("deputy") herbs, reinforcing the main action of building blood and driving out cold.

• Rice-paper pith (Tong cao): Helps open and clear the channels so blood and fluids can move more freely.
• Jujube dates (Da zao) and honey-fried licorice (Zhi gan cao): Strengthen digestive energy, gently support the production of blood, and protect the system.

Jujube is used in a relatively larger amount. This not only works with Chinese angelica and white peony to support blood and nourishment, but also helps prevent the warm, drying nature of cinnamon twig and asarum from becoming too harsh and damaging fluids. Licorice harmonizes the overall formula and helps balance the effects of the other herbs.

Traditional Dosage and How It Was Taken

Traditional composition (raw-herb amounts):

• Chinese angelica (Dang gui): 12 g
• Cinnamon twig (Gui zhi): 9 g
• White peony root (Shao yao): 9 g
• Asarum root (Xi xin): 3 g
• Rice-paper pith (Tong cao): 6 g
• Jujube dates (Da zao): 8 pieces
• Honey-fried licorice (Zhi gan cao): 6 g

Traditional method: The seven ingredients are decocted together: add them to about 8 cups of water, boil down to about 3 cups, strain out the herbs, and drink the warm liquid in 3 divided doses over the day, about 1 cup each time.

Modern method: In practice today, it is usually prepared as a standard herbal decoction: the herbs are simmered in water and the resulting tea is taken warm as directed by a TCM practitioner.

Common Adjustments in Clinical Use

TCM practitioners often adjust Dang Gui Si Ni Tang based on specific symptoms, while keeping the core goal of warming and nourishing the blood circulation:

• If there is pain in the lower back, hips, legs, or feet due to blood deficiency and cold congealing in the vessels, additional herbs are used to move blood and dispel blood stasis. Common additions include herbs such as dipsacus root, achyranthes root, chicken blood vine, and chaenomeles fruit (mu gua) to promote smoother blood flow and ease pain.
• If there is also nausea or vomiting caused by retained fluids (so-called “water retention” in TCM), warming herbs like evodia fruit and fresh ginger may be added to warm the stomach, redirect downward movement, and calm the digestive system.
• If a woman has menstrual-period lower abdominal pain, or a man has cold-type groin pain, cold hernia-type pain, pulling or aching pain in the testicles that radiates to the lower abdomen with cold limbs and a tight, wiry pulse, herbs like lindera root, fennel, galangal, and cyperus rhizome may be added to regulate qi, warm the interior, and relieve pain.

Main Benefits of Dang Gui Si Ni Tang

Key functions in TCM terms:

• Warms the channels and disperses internal cold.
• Nourishes the blood and improves circulation through the vessels.

Main pattern it treats: “Blood deficiency with cold causing icy extremities.” In everyday health language, this describes a situation where the blood is too weak and cold has settled in, making circulation sluggish so the hands and feet become very cold.

Typical signs TCM doctors look for include:

• Cold hands and feet (especially palms to wrists, soles to ankles).
• Pain in the lower back, hips, legs, feet, shoulders, or arms that gets worse with cold.
• Lack of thirst or no desire to drink water.
• Pale tongue with a thin white coating.
• Deep, thin pulse, or a very fine pulse that feels like it could disappear.

In the clinic, this formula is considered when cold hands and feet come together with some of the signs above. The combination of icy extremities, pain in the limbs or lower back, lack of thirst, pale tongue with white coating, and a deep, fine, or nearly absent pulse are key diagnostic features.

Scientific and Classical References

While Dang Gui Si Ni Tang is a traditional formula, some of its core ideas align with modern research on circulation, blood health, and warming therapies:

• The classic text Huang Di Nei Jing (The Yellow Emperor’s Inner Classic) emphasizes that “when blood is deficient and cold settles in the channels, the limbs become cold and painful,” which matches the pattern this formula targets (Huang Di Nei Jing, Plain Questions, Chapter on Cold and Heat).
• Chinese angelica (Dang gui) has been studied for its potential to support blood health and circulation, showing antioxidant and vasodilatory effects that may help improve blood flow (PMID: 20347849).
• Cinnamon-related warming herbs have demonstrated effects on microcirculation and peripheral blood flow in experimental settings, supporting the traditional use of warming the channels in cold-type circulatory issues (PMID: 18477469).

Important Safety Notes

Please read these safety points carefully before considering any use of Dang Gui Si Ni Tang:

• Not a DIY formula: This is a classical prescription-strength herbal combination used by licensed TCM professionals. It should not be self-prescribed or improvised at home.
• Work with a qualified TCM practitioner: Proper use requires pulse, tongue, and symptom evaluation to confirm that you truly have a “cold with low blood and weak circulation” pattern, not another condition that might look similar on the surface.
• Possible interactions: Ingredients like Chinese angelica and cinnamon may interact with blood thinners, antiplatelet drugs, diabetes medications, and blood pressure medications. Always tell your medical doctor and pharmacist about any herbs you are taking or planning to take.
• Not for heat-type or inflammatory conditions: If you tend to feel hot, have red face, irritability, burning pain, or signs of infection or inflammation, this warming formula may be inappropriate or could worsen symptoms.
• Pregnancy and breastfeeding: If you are pregnant, planning pregnancy, or breastfeeding, do not use this formula unless it is specifically evaluated and prescribed by a practitioner with experience in both OB care and TCM.
• Quality matters: Herbs like asarum (xi xin) are regulated in many countries because of potential toxicity when misused or misidentified. Only use products from reputable sources under professional guidance.
• Emergency symptoms: Very cold limbs with chest pain, shortness of breath, confusion, or collapse can be signs of a medical emergency (shock, heart attack, stroke). Call emergency services immediately; do not rely on herbal formulas.

3-Second Self-Test + 30-Second Self-Care

3-second self-test:
If your hands and feet are often icy cold and you notice you’re low on energy, pale, and prefer warm drinks rather than cold ones, then you may be showing a “cold with low blood and circulation” pattern that TCM often associates with formulas like Dang Gui Si Ni Tang.

30-second self-care (do this immediately if the above sounds like you, and it’s not an emergency):
If you suspect this pattern, then immediately:

• Gently rub your palms and soles together for 30 seconds to boost local circulation.
• Put on warm socks or gloves and sip a small amount of warm (not scalding) water.
• As soon as you can, schedule a visit with a qualified TCM practitioner and also discuss your symptoms with your primary care provider to rule out anemia, circulation problems, thyroid issues, or other medical conditions.

For informational purposes only. Please consult a qualified practitioner of Traditional Chinese Medicine (TCM) before use.