Read this first
When to worry
Constipation is common, and in most people it comes down to fibre, fluid, movement and habit. A minority of cases are the first sign of a structural problem in the bowel, and those are identified by what changed and who it happened to rather than by how uncomfortable things are. Read this list before the rest.
Get help now — same day or emergency
- No stool for several days together with severe abdominal pain, a swollen abdomen, vomiting, or the inability to pass gas. This can be obstruction and is a surgical emergency.
- Vomiting that turns feculent, or abdominal pain that comes in waves and then eases — a bowel trying to push past a blockage.
- Rectal bleeding beyond a streak on the paper, or black tarry stool, with dizziness or a racing heart.
- Constipation with confusion, a fast heart rate or a fever in an older person. Impaction and infection present this way more often than textbooks suggest.
- Severe new constipation after starting an opioid or a nerve-pain medicine, with no bowel plan in place.
Get it looked at within days
- A persistent change in bowel habit after the age of 45, particularly towards looser or more frequent stools, or with a feeling of never finishing.
- Unexplained weight loss, anaemia on a blood test, or a family history of bowel cancer with new constipation.
- Constipation alternating with diarrhoea over weeks, or abdominal pain that is relieved by opening the bowels.
- Blood on the stool, on the paper or in the bowl — even once, even if a fissure seems to explain it.
- Constipation that has become dependent on laxatives, or that is worsening despite adequate fibre and fluid.
Bleeding and a change in habit are the two findings that matter most, and neither can be diagnosed by reading. Both are cheap to check. The rest of this page assumes neither applies.
One rule for this whole list: if you are not sure whether a line applies to you, treat it as though it does — and get it checked. Uncertainty is a reason to be seen, not a reason to wait.
Four kinds of constipation, judged by the stool
The word covers at least four different situations, and they call for opposite measures. Treating the third type with bulking agents makes it worse, which is a common and avoidable mistake.
Dry and hard
Small, dry, pellet-like stool that is difficult to pass, often with thirst, a dry mouth, and a red tongue with a dry coat.
Points to Traditionally heat or dryness consuming fluid. In practice also what low fluid intake and several common medicines produce.
Normal consistency, hard to pass
The stool is not dry, but the urge is weak, the effort is long, and there is a sense of unfinished business afterwards.
Points to Traditionally qi stagnation or qi deficiency — the bowel has the water but not the push.
Soft but never finished
Sticky or soft stool in frequent small amounts, a feeling of incompleteness, often with a greasy tongue coat and heaviness in the body.
Points to Traditionally dampness. Bulking agents and stimulant laxatives both tend to make this worse.
Alternating
Days of hardness followed by days of looseness, often with cramping, and often tracking stress or the menstrual cycle.
Points to Traditionally liver constraint over the spleen. Medically this pattern needs assessment rather than a laxative.
What the patterns describe
The traditional account treats the bowel as an organ of transmission rather than a tube: it receives what the stomach and spleen have finished with, separates the clear from the turbid, and passes on what is left. Constipation is read as a failure at one of those steps — not enough fluid to make the stool move, not enough push to send it, or too much damp holding it in place.
The practical value is in the distinction, not the theory. Dry pellet stool with thirst calls for fluid and moisture, traditionally pears, honey, sesame, spinach, and enough plain water. Weak urge with normal stool calls for tone: regular meals, cooked food, less raw salad, and a fixed toilet time after breakfast when the gut is already moving. Sticky incomplete stool calls for less damp: fewer fried and sugary foods, less dairy, more bitter greens and barley. Alternating stool with cramping calls for the stress measures first, because adding fibre to an irritable bowel often makes the cramping worse.
What none of this does is exclude a structural cause. A pattern reading explains the quality of the stool, not the reason a habit changed at 52. When the change is new, the checks above come first and the pattern question comes later.
Which patterns it belongs to
These are the patterns this symptom is conventionally grouped under. They are not competing diagnoses — most people meet one, and the point of the list is to show you which questions separate them.
Sticky stool that is hard to wipe, a burning sensation, a bitter taste, a yellow greasy tongue coat, dark scanty urine, a slippery rapid pulse.
The sticky, incomplete type, common in people who eat late, drink alcohol, or live somewhere hot and humid.
Read the pattern page →Normal stool that is hard to move, a long effort for little result, fatigue, a low voice, sweating on slight exertion, a weak pulse; worse when tired.
The weak-urge type, common after illness, in the very sedentary, and in older people.
Read the pattern page →Dry pellet stool with a pale face, dry skin and hair, palpitations, dizziness on standing, a thin pulse, a pale tongue with a thin dry coat.
The dry type, common with heavy periods, after childbirth, and in long-term restrictive eating.
Read the pattern page →Alternating hard and loose stool with cramping, rib-side distension, sighing, a bitter taste, worse during stressful weeks, a wiry pulse.
The alternating type, and the one that tracks deadlines, travel and arguments.
Read the pattern page →The signs behind it
Each line below is one entry in the sign table — the same table the self-check draws its follow-up questions from. The tier says how strongly that sign points at the pattern: a defining sign is expected, a common one is usual, a supporting one is optional.
- Dry, hard stool Kidney yin deficiencycommon ·Damp-heatsupporting
- Straining with little result Qi deficiencycommon ·Spleen qi deficiencycommon ·Spleen yang deficiencysupporting
- Sticky, incomplete bowel movements Dampnessdefining ·Damp-heatcommon
- Alternating constipation and loose stools Liver qi stagnationsupporting ·Spleen qi deficiencysupporting
Not every sign listed here will apply to you — a sign only counts alongside the others. The self-check is the place to weigh them against your own answers.
Telling them apart
Four questions do most of the work. Each one splits the field in half, and after two or three the pattern is usually clear enough to act on — or clear enough to know that the answer is medical rather than traditional.
| Question | If yes | If no |
|---|---|---|
| What does the stool look like? | Dry, hard, pellet-like → heat or dryness, or simply too little fluid. Start with water and see. | Soft or sticky → dampness. Adding fibre will usually make it worse, not better. |
| Is the problem the stool, or the effort? | The stool is normal but hard to pass, and you feel tired → qi deficiency. | The stool is dry and you are thirsty with a red tongue → fluid and dryness, not push. |
| Does it alternate with loose days and cramping? | Yes, and it tracks stress → liver constraint over the spleen, and the stress measures come first. | Steady hardness without cramping → the simpler fluid-and-habit picture. |
| Has the habit changed in the last few months after years of being stable? | Yes, and you are over 45, or there is bleeding, weight loss or anaemia → get it assessed before treating it as a pattern. | No change in habit, just a longstanding tendency → pattern work is reasonable. |
What you can do at home
None of this treats a named condition, and none of it replaces assessment. These are the ordinary measures attached to this symptom — low risk, and worth doing while you work out what is actually going on.
- Fix the time, not the medicine. The gut has its own clock and it is most obliging twenty to forty minutes after breakfast. Sitting for ten unhurried minutes at that hour for two weeks does more than most laxatives sustain.
- Add fluid before fibre. Increasing bran without increasing water produces harder stool, not softer, and this is the most common reason a fibre trial fails.
- For dry stool, the traditional foods are pears, honey, sesame, spinach, figs and enough plain warm water. For sticky stool, the useful direction is the opposite: less fried, less sugar, less dairy, more barley and bitter greens.
- Do not use stimulant laxatives daily. They work, and that is the problem — the bowel adapts, the dose climbs, and stopping becomes difficult.
- Walk after the evening meal. Ten minutes of walking moves the gut more reliably than any single food, and it also addresses the sleep that most constipation advice ignores.
Classical sources
Quoted in the original, with our own translation and the chapter it comes from. We do not reproduce existing English translations — they are someone else's reading.
大肠者，传道之官，变化出焉。 dà cháng zhě, chuán dǎo zhī guān, biàn huà chū yān
The large intestine is the officer of transmission, where transformation takes place.
趺阳脉浮而涩，浮则胃气强，涩则小便数，浮涩相搏，大便则硬，其脾为约。 fū yáng mài fú ér sè, fú zé wèi qì qiáng, sè zé xiǎo biàn shuò, fú sè xiāng bó, dà biàn zé yìng, qí pí wéi yuē
When the fuyang pulse is floating and hesitant, the stomach qi is strong and the urine is frequent; the two together make the stool hard, and the spleen is said to be constrained.
诸厥固泄，皆属于下。 zhū jué gù xiè, jiē shǔ yú xià
All reversal, retention and incontinence belong to the lower.
The Shanghan Lun passage is given in its short form; the full clause continues with the formula Mahuang Zi Ren Wan, which we have not evaluated and do not recommend. The mechanism described — fluid diverted to the urine leaving the stool hard — is still the clearest classical statement of the problem, which is why it is quoted.
Terms used on this page
One concept, several names. The standard term comes first; pinyin and characters are there so you can search and cross-check; older aliases are what you will meet in other people's writing.
| Standard term | Pinyin | 中文 | Also written as |
|---|---|---|---|
| Constipation | biàn mì | 便秘 | Also 大便难 in classical texts |
| Spleen constraint | pí yuē | 脾约 | A classical category: hard stool with frequent urine, read as fluid diverted away from the bowel |
| Transmission | chuán dǎo | 传道 | The large intestine's classical function — receiving, separating, passing on |
| Slippery pulse | huá mài | 滑脉 | Feels smooth and rounded under the finger, like a bead rolling |
Check your own pattern
Constipation is a symptom, and symptoms appear in several patterns. The self-check weighs twelve questions against all twelve patterns and shows you what fits — and what doesn't quite.
Start the self-checkAbout four minutes. No account, nothing stored on a server, and an address for the printable report is optional.