You haven’t had a satisfying bowel movement in several days, but then you notice watery leakage or staining. It may seem as though the loose stool means the constipation has passed. The two symptoms can feel like they shouldn’t happen at the same time.

Can constipation cause bowel leakage? Yes. In some cases, softer or liquid stool passes around hard stool that remains in the bowel. This may be called bowel overflow incontinence, overflow diarrhea, paradoxical diarrhea or constipation-related bowel leakage.1,2

In this article, “overflow incontinence” means bowel leakage related to retained stool—not urinary overflow incontinence, which affects the bladder. Because similar symptoms can have different causes, a healthcare provider may need to determine what is responsible.

Can Constipation Cause Bowel Leakage?

Quick answer: Yes. Severe or ongoing constipation can sometimes cause bowel leakage when hard stool remains in the bowel and prevents it from emptying normally. Constipation and fecal incontinence can occur at the same time.1,2

Constipation may involve:

  • Hard, dry or lumpy stool
  • Difficulty or pain when passing stool
  • Fewer than three bowel movements per week
  • Feeling as though stool hasn’t fully passed3

A person does not need to have all of these symptoms to be constipated, and daily bowel movements are not required for health.

When hard stool remains in the bowel, softer or watery stool may pass around it. This can cause leakage, staining or watery bowel movements even though the bowel has not emptied.

Constipation is only one possible cause of accidental bowel leakage. Other causes include diarrhea, pelvic floor problems, muscle or nerve damage and digestive conditions.2,4

What Is Overflow Incontinence?

Bowel overflow incontinence happens when liquid or softer stool passes around hard stool that remains in the bowel. The person may pass some stool while the underlying constipation continues.1,2

Healthcare providers may also call this pattern overflow diarrhea, paradoxical diarrhea, fecal overflow incontinence or constipation-related bowel leakage. These terms may be used somewhat differently, but they generally describe leakage that occurs while hard stool remains in the rectum or colon.1,2

A quick clarification: This is different from urinary overflow incontinence, which involves the bladder and urine leakage.

How Does Overflow Bowel Leakage Happen?

Overflow bowel leakage can develop when stool remains in the bowel long enough to become hard and difficult to pass. Softer stool may then move around it.1,2

The Five-Step Process

  1. The bowel does not empty fully. Stool moves slowly or remains after a bowel movement.
  2. The stool becomes harder. The colon continues to absorb water from it.
  3. Hard stool builds up. The person may feel constipated, bloated or incompletely emptied.
  4. Softer stool passes around it. Liquid or soft stool moves through the available space.
  5. Leakage occurs. The person may notice watery stool, staining or seepage while still feeling constipated.

This pattern may occur with retained stool or fecal impaction, but symptoms alone cannot confirm an impaction. A healthcare provider must determine the cause.

What Are Possible Signs of Overflow Incontinence?

Possible signs include constipation along with unexpected staining, seepage, or watery leakage. The person may still feel as though they have not fully emptied their bowels.1–3

Possible Signs to Discuss with a Healthcare Provider

  • Ongoing constipation or hard, difficult-to-pass stool
  • Straining or feeling that stool has not fully passed
  • Small amounts of liquid stool, staining or seepage
  • Watery leakage despite continued constipation
  • Abdominal bloating or discomfort
  • Repeated apparent “diarrhea” after a period of constipation1–3

These symptoms can have several causes and cannot confirm fecal impaction. A healthcare provider must determine what is responsible.

Overflow Incontinence vs. Diarrhea: What Is the Difference?

Overflow leakage occurs when liquid or softer stool passes around retained hard stool. Uncomplicated diarrhea involves loose or watery stool moving through the bowel without the same constipation pattern. The two can look similar, so appearance alone may not show what is happening.1,2

PatternOverflow Leakage May InvolveUncomplicated Diarrhea May Involve
Bowel patternConstipation, hard stool or incomplete emptying1–3Repeated loose or watery bowel movements
What may be happeningSofter or liquid stool passes around hard stool that remains in the bowel1,2Stool moves through the bowel in loose or watery form
What the person may noticeStaining or watery leakage while still feeling constipated1,2Repeated loose bowel movements without the same constipation pattern

Important: Symptoms can overlap. Do not use this table to choose a medication or treatment without guidance from a healthcare provider.

Who May Be More Likely to Develop Constipation-Related Leakage?

Health conditions, medications, mobility, and access to a toilet may all affect a person’s risk. Age or disability alone does not cause overflow leakage.1–3

Factors may include:

  • Chronic or repeated constipation
  • Reduced mobility or difficulty reaching a toilet
  • Nerve, brain, memory or communication conditions that affect bowel movement or awareness
  • Medicines or supplements that contribute to constipation
  • Changes in diet, fluids, activity or daily routine
  • Pelvic floor, rectal or other digestive conditions1–3

Caution: Do not make major changes to fiber or fluid intake without considering the person’s health. Some heart, kidney and other conditions require fluid limits, and fiber may not be appropriate when an impaction or blockage is possible.

When Should You Contact a Healthcare Provider?

Contact a healthcare provider when constipation and bowel leakage are new, keep happening, become worse or interfere with daily life. Medical guidance is especially important when watery leakage continues despite difficulty passing stool.1–3

Arrange a medical discussion for:

  • New or repeated bowel leakage with constipation
  • Watery leakage despite hard or difficult-to-pass stool
  • Constipation that does not improve or keeps returning
  • Increasing bloating, discomfort or a major change in bowel habits
  • Symptoms that affect eating, sleep, mobility, skin or daily activities

When to seek prompt medical guidance. See a doctor right away if constipation occurs with:

  • Constant abdominal pain
  • Vomiting
  • Fever
  • Inability to pass gas
  • Rectal bleeding or blood in the stool3

The right level of care depends on the symptoms and the person’s health. A healthcare provider or nurse advice line can help determine the next step.

A provider may ask when the symptoms started, how often bowel movements and leakage occur, whether the stool is hard or watery, and which medicines or supplements the person uses. A stool diary can help show the relationship between constipation and leakage. The provider can then decide whether an examination or testing is needed.3,5

Managing Constipation-Related Leakage Safely

Leakage is a symptom, not a diagnosis. If hard stool is causing the leakage, focusing only on the watery stool does not address the constipation.

Before you reach for a remedy: Do not start an antidiarrheal, laxative, enema, suppository or stool softener based only on an online article. Do not stop a prescribed medicine without speaking with the healthcare provider who prescribed it. Treatment depends on whether an impaction is present, what is causing the constipation and the person’s other health needs.1,3,6

After an evaluation, a provider may discuss:

  • Safe relief of retained or impacted stool
  • Review of medicines and supplements
  • Fiber and fluid guidance based on the person’s health
  • Physical activity and regular toilet access when appropriate
  • Support for mobility or pelvic floor concerns
  • Follow-up to help prevent the problem from returning1,3,6

Some people need fluid limits because of heart, kidney or other conditions. Fiber needs can also vary.

Where StaySure® May Fit After the Cause Is Addressed

Important safety note: StaySure® does not treat constipation, fecal impaction or overflow diarrhea. Current StaySure® safety information lists fecal impaction with overflow diarrhea as a contraindication.7 The underlying bowel problem must be evaluated and addressed before StaySure® is considered.

StaySure® does not treat constipation, fecal impaction or overflow diarrhea. Current StaySure® safety information lists fecal impaction with overflow diarrhea as a contraindication.7 The underlying bowel problem must be evaluated and addressed before StaySure® is considered.

Some people may continue to have accidental bowel leakage after the constipation or impaction has been addressed. For an appropriate person, a healthcare provider may then discuss StaySure® as one possible management option.

StaySure® is a prescription-only silicone insert designed to help prevent accidental bowel leakage. It does not treat the cause and is not right for everyone.

Talk with a healthcare provider about your complete bowel pattern before considering StaySure®.

Review Instructions for Use  Learn How StaySure® Works

Frequently Asked Questions About Constipation and Overflow Incontinence

Can constipation cause bowel leakage?

Yes. Severe or ongoing constipation may cause leakage when hard stool remains in the bowel and softer or watery stool passes around it. Constipation is not the only possible cause of accidental bowel leakage.

Why am I leaking stool when I’m constipated?

Liquid or softer stool may be passing around hard stool that remains in the bowel. This can cause watery leakage or staining even though the bowel has not fully emptied. A healthcare provider should determine the cause.

Is overflow diarrhea the same as regular diarrhea?

No. Overflow diarrhea occurs when liquid stool passes around retained hard stool. Uncomplicated diarrhea does not involve the same retained-stool pattern. Because they can look similar, appearance alone may not reliably tell them apart.

Can I take an antidiarrheal for overflow leakage?

Do not start an antidiarrheal based only on watery leakage. If retained stool is involved, treating the symptom as ordinary diarrhea may miss the underlying constipation. Speak with a healthcare provider before starting medicine or changing your bowel routine.

When should I see a healthcare provider?

Discuss new or repeated leakage with constipation, continued trouble passing stool or a major change in bowel habits with a provider. Seek prompt guidance for constant abdominal pain, vomiting, fever, inability to pass gas, rectal bleeding or blood in the stool.3

Can StaySure® be used during fecal impaction or overflow diarrhea?

No. Current StaySure® safety information lists fecal impaction with overflow diarrhea as a contraindication.7 A possible impaction must be evaluated and addressed before StaySure® is considered. Review the current Instructions for Use and speak with a healthcare provider.

Constipation and Leakage Can Happen at the Same Time

Constipation and bowel leakage can occur together, and watery leakage does not always mean the bowel has emptied. Persistent constipation, incomplete emptying or unexpected leakage should be discussed with a healthcare provider so the cause can be addressed first.

References

  1. Araghizadeh, F. (2005). Fecal impaction. Clinics in Colon and Rectal Surgery, 18(2), 116–119. https://doi.org/10.1055/s-2005-870893
  2. National Institute of Diabetes and Digestive and Kidney Diseases. (2017). Symptoms & causes of fecal incontinence. In National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/bowel-control-problems-fecal-incontinence/symptoms-causes
  3. National Institute of Diabetes and Digestive and Kidney Diseases. (2018). Symptoms & causes of constipation. In National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/constipation/symptoms-causes
  4. American Society of Colon & Rectal Surgeons. (2020). Fecal incontinence. Fascrs.Org. https://fascrs.org/web/web/patients/diseases-and-conditions/a-z/fecal-incontinence.aspx
  5. National Institute of Diabetes and Digestive and Kidney Diseases. (2024). Diagnosis of fecal incontinence. In National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/bowel-control-problems-fecal-incontinence/diagnosis
  6. National Institute of Diabetes and Digestive and Kidney Diseases. (2017b). Treatment of fecal incontinence. In National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/bowel-control-problems-fecal-incontinence/treatment
  7. Minnesota Medical Technologies Corporation. (2026). Instructions for use. Staysuretoday.Com. https://www.staysuretoday.com/instructions-for-use