Why “Endometriosis” Isn’t One Diagnosis in Chinese Medicine: Five Classical Formulas, Matched to Your Pattern

By Yoon Hang Kim, MD, MPH

Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician

If you live with endometriosis, you already know the frustration: the same label gets handed to women whose experiences look nothing alike. One client’s pain eases the moment she presses a heating pad to her belly. Another’s flares the week her stress peaks. A third is less worried about the cramps than about why she can’t conceive. Same diagnosis on paper — three very different people sitting across from me.

In my practice I work in integrative and functional medicine, and I hold a medical acupuncture certification. That training reflects something conventional gynecology doesn’t emphasize: in Traditional Chinese Medicine (TCM), endometriosis was never treated as a single condition. It is treated as a pattern — and the right herbal formula is the one that matches your pattern, not the diagnosis on your chart.

The common thread — and an honest caveat

Chinese medicine views endometriosis as a problem of “blood stasis”: circulation in the pelvis that isn’t moving the way it should, pooling and congealing into the pain, clots, and masses clients describe. Biomedically, we understand endometriosis as endometrial-like tissue growing outside the uterus. The TCM image is poetic, but the clinical instinct behind it is practical — restore healthy movement. What differs from client to client, and what decides the formula, is why the stasis formed in the first place.

One honest caveat I give every client first: these TCM “patterns” are traditional diagnostic frameworks, not experimentally validated biological subtypes of endometriosis. They are genuinely useful for individualizing care, but they are not a substitute for a modern diagnosis or for your gynecologist. Where I use these herbs, I use them as adjuncts — alongside conventional care, never instead of it.

The five formulas, matched to your pattern

These are the five classical formulas most often used for endometriosis, each built for a different reason the blood is stuck. They are not interchangeable, and they are not meant to be combined at random — the art is in choosing the one that fits.

Gui Zhi Fu Ling Wan  (Cinnamon Twig & Poria Pill) — the broadest of the five, for straightforward blood stasis. The hallmark is fixed, stabbing pelvic pain with dark, clotted flow and palpable masses — and no strong cold or heat signs pulling the picture one way or the other. It’s the most commonly prescribed endometriosis formula in large Taiwanese prescribing data, and the one most studied alongside fibroids and ovarian cysts.

Shao Fu Zhu Yu Tang  (Lower Abdomen Decoction) — for cold-driven stasis. The giveaway is pain that clearly eases with warmth — the heating-pad client — along with cold hands and feet, aversion to cold, and very dark, nearly-black clotted flow. This is the strongest warming, blood-moving formula of the group, and it is not used when the picture is hot (bright-red bleeding, irritability, aversion to heat).

Wen Jing Tang  (Warm the Menses Decoction) — for the client who is depleted as well as cold. Alongside cold limbs and fatigue you see a paradoxical twist — warm palms and soles, dry lips, mild afternoon warmth — because the stasis itself generates a little false heat. Where the formula above simply warms and moves, this one also nourishes, which is why it’s one of the most important fertility formulas in TCM gynecology.

Jia Wei Xiao Yao San  (Augmented Free & Easy Wanderer) — for stress-driven, liver-qi stagnation. Here the symptoms track with the calendar and with life: pronounced PMS, irritability, breast tenderness, rib-side tension, cycles that go haywire during hard weeks. Rather than attacking the pelvic stasis head-on, it eases the upstream constriction that stalls the flow — the second most commonly prescribed endometriosis formula in that same Taiwanese data.

Nei Yi Wan  (Endometriosis Pill) — the most structurally focused — for deeply lodged stasis with masses, deep pain, and pain with intercourse. One important caution: “Nei Yi Wan” is not a single standardized recipe, so the exact ingredients must be verified product by product, and any version containing pangolin should never be used.

What the evidence actually says

I’ll tell you here what I tell my clients: Chinese herbal medicine for endometriosis is promising, but it is not settled. After reviewing the research, major guideline bodies such as the ESHRE 2022 endometriosis guideline concluded that we do not yet know, to their standard, whether these treatments reliably reduce pain or improve fertility. That is not the same as “proven useless” — it means the evidence isn’t strong enough yet to make a formal recommendation.

More recent studies are modestly encouraging. A 2025 analysis of Shao Fu Zhu Yu Tang added to conventional care, and a 2024 analysis of Gui Zhi Fu Ling combined with a standard medication, both favored the herb-plus-conventional combination for symptoms and pain. Both tested the herbs as helpers alongside conventional therapy — not as a replacement — and both flagged weak study quality. That is exactly how I read them, and exactly how I use them.

Safety comes first

Because these are prescription-strength herbs, a few things I never skip:

• Pregnancy and conception. Traditional “fertility” herbs are not automatically safe during conception or pregnancy; several of these formulas are traditionally avoided in pregnancy. If you are trying to conceive or might be pregnant, the plan changes.
• Bleeding and interactions. Blood-moving formulas can add to bleeding risk. I screen for blood thinners, heavy or abnormal bleeding, and upcoming surgery before anyone starts.
• Ingredients and sourcing. Some traditional formulas contain animal-derived or endangered ingredients — including, in certain products, pangolin, which is protected and should never be used. I verify every ingredient and use third-party-tested products.
• Structure deserves a real workup. Masses, ovarian cysts, and deep pain with intercourse warrant ultrasound or MRI and, when appropriate, a specialist. A normal pelvic exam does not rule out deep disease, and no herbal formula substitutes for proper imaging.

The bottom line

The strength of the Chinese medicine tradition here isn’t a miracle herb. It’s the refusal to treat every woman’s endometriosis as identical — the discipline of asking which pattern, and therefore which formula, fits this particular person right now. That is the same mindset I bring to integrative and functional medicine generally, and when it’s paired with good conventional care, I’ve found it gives clients a more personal, more complete plan than either approach offers alone.

If your endometriosis has been treated as one-size-fits-all and it hasn’t fit, that mismatch may be the problem worth solving. You can learn more about how I work at www.directintegrativecare.com.

Key references

• ESHRE 2022 endometriosis guideline (Hum Reprod Open)
• Cochrane review — Chinese herbal medicine for endometriosis (Flower 2012)
• Taiwanese endometriosis prescription database study (Tsai 2017)
• Shaofu Zhuyu Decoction meta-analysis, 2025 (Pharmaceuticals)
• Guizhi Fuling + dienogest meta-analysis, 2024 (PMC)