Ileostomy vs Colostomy Output: What Patients Should Know

For people new to an ostomy, one of the first things they notice after surgery is the output. Many wonder, “Is this normal?” or “Why is it so watery?” The truth is, colostomy and ileostomy output behave very differently—both in how they look and how often they occur.

Understanding these differences makes it easier to choose the right colostomy bag or ileostomy bag, helping reduce leaks and keep your skin comfortable.

Consistency and Chemical Makeup

The biggest difference between colostomy and ileostomy output comes down to water content and digestive enzymes.

Colostomy Output

Because waste passes through the colon, much of the water is absorbed. As a result:

• Output is usually formed or semi-formed
  
• It contains fewer digestive enzymes
  
• It is generally gentler on the skin

Ileostomy Output

Ileostomy output bypasses the colon completely, which means:

• Output is liquid or paste-like
  
• Digestive enzymes are still active
  
• These enzymes can irritate skin if leakage occurs, especially with prolonged contact

This is why skin protection is especially important for ileostomy care.

Normal Range: Volume and Frequency

Everyone’s routine is different, but knowing typical ranges helps you understand what’s normal for your body.

Typical Colostomy Output

• About 200–700 mL per day (roughly 1–3 cups)
• Often follows a more predictable pattern
• Many people empty or change their pouch 1–3 times daily
  

Typical Ileostomy Output

• About 600–900 mL per day
• Output is more frequent and continuous
• Most users empty their pouch 4–6 times per day

When Ileostomy Output Is Very High

According to PMC, ileostomy output that becomes very watery and increases beyond 1.5–2 liters per day is often described as high output.

Supporting Thicker Output
Some people find it helpful to include foods that naturally thicken output, such as:

• Bananas
• White rice
• White Pasta
• Smooth peanut butter
• oatmeal

Thicker output is generally easier to contain in the pouch and less likely to undermine the skin barrier.

How Output Impacts Pouch Wear Time

The nature of colostomy output and ileostomy output plays a big role in how long a pouching system stays secure.

Colostomy Wear Time

• More solid output is less likely to break down the skin barrier
• Many users enjoy longer wear times (3–5 days)
  

Ileostomy Wear Time