Recognising Constipation and Faecal Impaction for Student Nurses
Learn how to recognise significant changes in bowel function, identify symptoms that may suggest worsening constipation or possible faecal impaction, and know when concerns require further assessment.
What is constipation?
Constipation describes difficulty or reduced frequency in passing stool and may also involve hard stools, straining or a feeling of incomplete emptying. The important clinical question is whether there has been a significant change from the patient's normal bowel pattern.
Reduced bowel movements
The patient may report opening their bowels less frequently than usual.
Hard or difficult to pass
Stool may be dry or firm and the patient may describe significant straining or discomfort.
Abdominal discomfort
Bloating, abdominal discomfort, reduced appetite or nausea may occur alongside constipation.
Start with the patient's normal bowel pattern
Ask about baseline
Establish what is normal for the patient rather than assuming that one frequency is normal for everyone.
Identify the change
Ask when the patient last opened their bowels and how stool frequency and consistency have changed.
Ask about symptoms
Consider abdominal pain, bloating, distension, nausea, vomiting and reduced appetite.
Consider contributing factors
Think about fluid intake, diet, mobility, recent illness and medicines that may affect bowel function.
When constipation becomes more significant
Faecal impaction occurs when a large mass of stool becomes difficult to pass. Student nurses should recognise concerning patterns and report them rather than attempting to confirm the diagnosis independently.
Prolonged bowel difficulty
A history of worsening constipation or inability to pass a normal bowel movement should prompt further assessment.
Increasing discomfort or distension
New abdominal swelling, fullness or pain may increase concern.
Loose stool does not always exclude constipation
Small amounts of loose stool may sometimes occur despite significant retained stool, so the wider bowel history remains important.
Look at the whole gastrointestinal picture
| Finding | What you may notice | Why it matters |
|---|---|---|
| Abdominal distension | The abdomen appears increasingly swollen or full. | New or worsening distension should be assessed alongside bowel history and other symptoms. |
| Abdominal pain | Discomfort becomes more significant or persistent. | Increasing pain requires reassessment rather than being assumed to be uncomplicated constipation. |
| Vomiting | The patient begins vomiting or cannot tolerate oral intake. | Vomiting combined with bowel change or distension increases concern. |
| Reduced intake | The patient eats or drinks less because of discomfort or nausea. | Poor intake may contribute to dehydration and further deterioration. |
| Confusion or behaviour change | An older or vulnerable patient becomes newly confused or unsettled. | New confusion requires assessment for wider causes and should not automatically be attributed to constipation. |
| Changing observations | Vital signs or overall condition worsen. | Physiological deterioration requires assessment of the whole patient. |
Why might constipation develop?
Constipation often has more than one contributing factor. Understanding these factors can help you build a clearer clinical picture and communicate useful information to the registered nurse.
Reduced fluid intake
Poor intake may contribute to harder stool and worsening bowel difficulty.
Reduced movement
Illness, bed rest and reduced mobility can affect normal bowel function.
Medication effects
Some medicines can contribute to constipation. Medication history should therefore form part of the wider assessment.
Changes in food intake
Reduced appetite or significant changes in diet may alter bowel habits.
Privacy and access
Lack of privacy, unfamiliar surroundings or difficulty accessing a toilet may affect normal bowel routines.
Changes in health
Acute illness and changes in physical condition can affect bowel function.
Findings that should increase concern
- New or worsening abdominal distension.
- Significant or progressively worsening abdominal pain.
- Persistent vomiting or inability to tolerate oral intake.
- Marked deterioration in the patient's general condition.
- New confusion, collapse or reduced responsiveness.
- Blood in the stool or suspected gastrointestinal bleeding.
- Abnormal or worsening physiological observations.
- A major change in bowel function that cannot be explained by the usual pattern.
The bowel chart does not tell the whole story
Example
An older patient has not passed a normal stool for several days. During your shift they report increasing abdominal discomfort and poor appetite.
You notice that their abdomen looks more distended than earlier. They later pass a small amount of loose stool.
Rather than assuming the loose stool means the constipation has resolved, you consider the wider pattern: prolonged bowel difficulty + increasing distension + discomfort + reduced intake.
You communicate your findings to the registered nurse and request further assessment.
Give a useful bowel history
Example escalation
“I'm concerned about Mr Taylor. He has not passed a normal stool for several days and his abdomen is more distended today. He is reporting increasing discomfort and has eaten very little.”
This provides a pattern of change rather than simply stating that the patient is constipated.
Errors to avoid
- Assuming everyone should open their bowels every day.
- Failing to establish the patient's normal bowel pattern.
- Assuming loose stool automatically excludes constipation or impaction.
- Ignoring worsening pain, vomiting or abdominal distension.
- Focusing on bowel frequency without assessing hydration, intake and mobility.
- Performing invasive assessment beyond your competence or local policy.
- Attributing all deterioration to constipation without considering other causes.
Baseline → bowel pattern → symptoms → escalate
Connect bowel changes with the whole patient
Constipation becomes more clinically meaningful when you connect bowel pattern with abdominal symptoms, hydration, mobility, medicines and any change in the patient's wider condition.
Explore Clinical Confidence →