Chronic Constipation

Constipation is generally defined as having fewer than three bowel movements per week, or experiencing hard, dry, or lumpy stools that are difficult or painful to pass. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), constipation becomes chronic when these symptoms persist over an extended period and do not resolve with basic self-care measures.

Chronic constipation is one of the most common gastrointestinal complaints. The American College of Gastroenterology notes that it affects approximately 15% of the general population, with higher prevalence among older adults, women, and individuals with lower income. It may be associated with inadequate fiber intake, physical inactivity, certain medications (including opioids, iron supplements, and some antidepressants), pelvic floor dysfunction, and various systemic conditions such as diabetes and hypothyroidism.

Chronic constipation is typically classified as functional (no identifiable structural cause) or secondary (caused by an underlying medical condition or medication). The Rome IV criteria are commonly used to diagnose functional constipation. First-line management includes lifestyle modifications such as increasing dietary fiber and fluid intake, regular physical activity, and over-the-counter laxatives. Prescription medications and, in some cases, referral to a gastroenterologist may be necessary.

This is an educational description of traditional TCM frameworks. It is not a diagnosis or individualized treatment recommendation.

In Traditional Chinese Medicine, chronic constipation is understood through the concept of intestinal dryness, qi stagnation, and deficiency patterns. TCM theory recognizes that normal bowel movements depend on the coordinated downward movement of qi by the Large Intestine, supported by the Spleen's transformation and transportation functions. When this process is disrupted, stool accumulates and becomes difficult to pass.

Several traditional pattern frameworks are commonly discussed in TCM literature for constipation-type presentations:

• Intestinal Dryness from Heat — Excessive heat in the body (which may arise from dietary factors, insufficient fluid intake, or constitutional tendency) can dry the intestinal fluids, making stool hard and difficult to pass. This pattern is often associated with dry mouth, thirst, dark urine, and a preference for cold drinks.
• Qi Stagnation — Emotional stress, irregular eating habits, or a sedentary lifestyle can cause qi to stagnate in the intestines, preventing normal peristaltic movement. This may present with infrequent stools, abdominal distension, a sensation of incomplete evacuation, and mood changes such as irritability or depressed mood.
• Food Accumulation — Overeating, consuming heavy or greasy foods, or weakened Spleen function can lead to food stagnation in the digestive tract, causing bloating, foul-smelling stools, and constipation alternating with diarrhea-like symptoms.
• Spleen Qi and Blood Deficiency — When the Spleen is too weak to generate sufficient qi and blood, the intestinal tract loses the nourishment and motility needed for normal defecation. This pattern is common in older adults, postpartum women, and individuals with chronic illness. It may be accompanied by fatigue, pale complexion, and loose stools that alternate with constipation.
• Kidney Yin or Yang Deficiency — In chronic or elderly patients, kidney deficiency (either Yin or Yang) may underlie constipation. Kidney Yin deficiency presents with dry stools and night sweats; kidney Yang deficiency presents with difficulty passing stool despite a normal appearance of the stool, cold limbs, and lower back soreness.

Commonly discussed TCM approaches include herbal formulations such as Ma Zi Ren Wan (for intestinal dryness), Run Chang Tang (for chronic dryness patterns), and Zeng Ye Tang (for fluid depletion). Acupuncture points such as ST25 (Tianshu), ST37 (Shangjuxu), and LI4 (Hegu) are frequently mentioned in TCM digestive literature. These descriptions reflect traditional frameworks and do not constitute evidence-based treatment recommendations.

Research on TCM approaches for chronic constipation has grown in recent years, but the evidence base has important limitations. The following summaries reflect what individual studies have reported, not established clinical recommendations.

Chinese Herbal Medicine for Functional Constipation (Systematic Review)

A 2022 systematic review and meta-analysis by Lyu et al., published in World Journal of Clinical Cases, evaluated 97 randomized controlled trials involving 8,693 patients with functional constipation. The review reported that Chinese herbal medicine (CHM) was associated with a higher efficacy rate compared with conventional treatments (OR: 3.62, 95% CI: 3.19-4.11), more frequent bowel movements, and improvement in global symptoms and stool consistency. However, the authors explicitly noted that “a firm conclusion could not be reached because of the poor quality of the included trials” and called for “further trials with higher quality.”

Herbal Medicine for Functional Gastrointestinal Disorders (Systematic Review)

A 2020 systematic review with meta-analysis by Tan et al., published in Journal of Gastroenterology and Hepatology, examined herbal medicines for functional gastrointestinal disorders including IBS, functional dyspepsia, and functional constipation. The review found that herbal medicines showed potential benefits for functional constipation but noted significant heterogeneity across studies and variation in herbal formulations used. The authors emphasized the need for standardized preparations and more rigorously designed trials.

Acupuncture for Chronic Functional Constipation (Network Meta-Analysis)

A 2024 systematic review and network meta-analysis by Tan et al., published in European Journal of Gastroenterology & Hepatology, compared the relative efficacy and safety of chemical drugs, fecal microbiota transplantation (FMT), probiotics, dietary fiber, and acupuncture in 45 RCTs with 17,118 patients. The review reported that electroacupuncture had the lowest ranked incidence of adverse effects among the treatment modalities evaluated. However, the review was limited by the quality of the included RCTs, many of which were conducted in China and may have had methodological limitations.

Overall Evidence Limitations

The existing research on TCM for chronic constipation has several consistent limitations: many studies are small and conducted at single centers in China; methodological quality varies considerably; herbal formulations are often not standardized, making generalization difficult; few studies include long-term follow-up or assess recurrence rates; and blinding is challenging in herbal medicine and acupuncture trials. As a result, the evidence does not establish a standard TCM treatment recommendation for chronic constipation, and TCM should not replace conventional medical evaluation and management.

The following symptoms require prompt conventional medical evaluation and should not be attributed to simple constipation:

• Sudden, severe abdominal pain
• Vomiting alongside constipation
• Blood in stool or bleeding from the rectum
• Black, tarry stools (melena)
• Unexplained weight loss
• Persistent or progressive change in bowel habits
• Inability to pass gas
• Constipation alternating with diarrhea

Children: Constipation in children requires pediatric evaluation. Do not give laxative herbs or herbal products to children without professional guidance. Chronic constipation in children may indicate underlying conditions such as Hirschsprung disease or hypothyroidism.

Pregnancy: Pregnant individuals experiencing constipation should consult their obstetric provider before using any herbal products. Some herbs traditionally used for constipation (such as those containing anthraquinones, like Da Huang / Rhubarb) have limited safety data during pregnancy and may stimulate uterine contractions.

Older adults: Constipation in older adults is common and may have multiple contributing factors including medications, reduced mobility, and decreased fiber intake. A thorough medical evaluation is important to rule out obstruction, colorectal cancer, and other serious conditions.

Medication interactions: Individuals taking opioids, iron supplements, calcium channel blockers, anticholinergics, or other constipation-inducing medications should not add herbal products without consulting a qualified healthcare provider.

Long-term self-use of laxative herbs: Some TCM laxative herbs (such as Fan Xie Ye / Senna and Da Huang / Rhubarb) contain anthraquinones. Prolonged use of anthraquinone-containing laxatives has been associated with melanosis coli, electrolyte disturbances, and potential dependence. These should not be used long-term without professional supervision.