Digestion problems: How common is it?

## Digestion, Hormones, and the Strength of the Middle Burner

In clinical practice, the most common complaints I see are digestive. Bloating, fatigue after eating, loose stools, heaviness, poor appetite, reflux, food intolerances, and that familiar sense of “my body just isn’t processing things properly” appear again and again.

This matters because digestion is not separate from the rest of the body. In Western physiology, digestion breaks food down into absorbable nutrients used for energy, growth, and repair; the process is coordinated by organs, nerves, hormones, digestive juices, the microbiome, and circulation. The stomach and intestines also produce hormones that influence digestive juices, hunger, fullness, and broader metabolic function. ([NIDDK][1])

Traditional Chinese Medicine offers another lens. It does not look only at isolated organs, but at functional systems. The **Spleen and Stomach**, often called the **Middle Burner**, are central to the making of Qi and Blood. They are the foundation of what we call **Acquired Essence** — the vitality we build after birth through food, breath, rest, rhythm, and care.

This is why digestive weakness can affect so much more than the stomach. When the Middle Burner is strong, food is transformed into usable nourishment. When it is weak, the body may struggle to extract the “clear” from the “turbid.” Over time, this can affect energy, muscle tone, mood, concentration, menstrual health, fertility, and hormonal resilience.

One of the most common patterns is **Spleen Qi deficiency**. This is a true deficiency: the day-to-day function of digestion is impaired. Traditional descriptions often include poor appetite, abdominal fullness after meals, loose stools, fatigue, weakness, and a pale or swollen tongue. Published TCM literature similarly describes Spleen Qi deficiency with poor appetite, post-meal abdominal fullness, loose bowel movements, fatigue, pale complexion, and weak pulse. ([PMC][2])

If Spleen Qi deficiency deepens, it may become **Spleen Yang deficiency**. Here, the warming power of digestion has become depleted. The person may feel cold, prefer warm foods and drinks, have cold hands and feet, feel tired in a deeper way, and pass watery stools or stools containing undigested food. Traditional sources describe Spleen Yang deficiency as involving cold limbs, fear of cold, poor appetite, bloating, watery or undigested stools, and abdominal discomfort relieved by warmth. ([PMC][2])

Another very common pattern is **Dampness in the Spleen**. This is often described as an excess arising from deficiency. In other words, the Spleen is too weak to transform fluids cleanly, so heaviness, mucus, swelling, fogginess, bloating, or sluggish digestion may accumulate.

From a dietary perspective, Spleen Qi and Spleen Yang deficiency require warmth, simplicity, and consistency. The first principle is to avoid constantly cooling the Digestive Fire. This means reducing chilled drinks, iced smoothies, frozen foods, excessive raw salads, and grazing on cold foods straight from the fridge. Raw foods are not “bad,” but for a weak Middle Burner they may be too demanding.

Warm cooked meals are usually more supportive: soups, stews, congee, slow-cooked grains, gently cooked vegetables, broths, warming spices, and regular mealtimes. Fruit may be easier when stewed, poached, or baked rather than eaten cold and raw.

This does not replace medical care. Persistent diarrhoea, severe pain, black or bloody stools, fever, dehydration, unexplained weight loss, or symptoms that do not improve should be assessed medically. Mayo Clinic advises adults to seek medical care for diarrhoea lasting more than two days without improvement, severe abdominal or rectal pain, dehydration, fever, or bloody or black stools. ([Mayo Clinic][3])

But for everyday vitality, the message is simple: protect the Middle Burner. Warm the digestion. Eat regularly. Eat with calm. Give the body food it can actually transform. In doing so, you support not only digestion, but the foundation from which energy, hormones, clarity, and resilience are built.

[1]: https://www.niddk.nih.gov/health-information/digestive-diseases/digestive-system-how-it-works?utm_source=chatgpt.com "Your Digestive System & How it Works - NIDDK"

[2]: https://pmc.ncbi.nlm.nih.gov/articles/PMC4767755/?utm_source=chatgpt.com "Current concept of Spleen-Stomach theory and Spleen deficiency syndrome in TCM - PMC"

[3]: https://www.mayoclinic.org/symptoms/diarrhea/basics/when-to-see-doctor/sym-20050926?utm_source=chatgpt.com "Diarrhea When to see a doctor - Mayo Clinic"