Fatigue, Edema, and the Spleen-Kidney Question
A 47-year-old woman presents with 6 months of fatigue, 3–4 loose stools per day, cold intolerance, and bilateral ankle edema rated 2+ on compression. She reports nocturia 2–3 times nightly, a dull low back ache, and bloating after meals. Her tongue is pale, swollen, with teeth marks and a thin white coat; her pulse is deep and weak, most noticeably at the right guan and both chi positions. She also mentions dry mouth at night but has no desire to drink. She is not on diuretics and has no fever. She asks whether her problem is Spleen or Kidney and wants a treatment plan.
1. Identify the root and branch patterns in this case, and justify your assignment using the specific signs and pulse findings.
Read the worked answer
Root: Kidney Yang deficiency. Branch: Spleen Yang deficiency with dampness.
Reasoning:
- Both chi positions are deep and weak, and the low back ache plus nocturia 2–3 times nightly point to Kidney Yang failing to warm and stabilize the lower jiao.
- Cold intolerance and ankle edema fit Yang deficiency with water not transforming; the edema is not inflammatory because there is no fever, redness, or heat.
- The Spleen signs - loose stools, bloating, pale swollen tongue with teeth marks - are real but secondary. Spleen Yang depends on Kidney Yang; when the root is cold, the Spleen cannot transform or transport.
- Dry mouth without desire to drink is not true heat. It suggests dampness preventing clear fluids from rising, which supports the branch diagnosis rather than contradicting it.
- The right guan weakness confirms Spleen involvement, but the overall deep weak pulse with chi involvement makes Kidney the root.
2. State a treatment principle and explain why treating only the Spleen would be insufficient. Name two or three points you would consider and why.
Read the worked answer
Treatment principle: Warm and tonify Kidney Yang, fortify the Spleen, and transform dampness.
Why not Spleen only:
- Tonifying Spleen alone may reduce bloating and loose stools briefly, but the cold lower back, nocturia, and edema will persist because Kidney Yang remains untreated.
- The branch will recur whenever the root remains cold, so the plan must address both levels.
Point reasoning:
- Du-4 (Mingmen) and BL-23 (Shenshu) with gentle moxa: local and back-shu points to warm Kidney Yang.
- Ren-4 (Guanyuan) with moxa: warms the lower jiao and supports water transformation.
- ST-36 (Zusanli) and SP-9 (Yinlingquan): fortify the Spleen and drain dampness without draining the root.
- Use gentle moxa and monitor for dryness or heat signs; if the tongue becomes red or the patient feels thirsty and restless, reduce moxa and reassess.