Why Do We Have a Stomachache When We Want to Poop? Understanding What Happens in the Large Intestine

Have you ever wondered why you experience a stomachache when you feel the urge to poop? This sensation is more common than you might think and is actually a natural part of the digestive process. In this article, we will delve into the science behind this phenomenon, explaining why our bodies sometimes react in this way, and what is happening in the large intestine when you want to poop.

Understanding the Poop Reflex

The poop reflex, also known as the defecation reflex, is a complex process involving various parts of the digestive system. When your large intestine (colon) is full and reaches a certain capacity, it activates the nerves in the bowel wall, which can trigger a feeling of needing to pass stool. This reflex is a natural mechanism to ensure that waste is properly eliminated from the body. However, this activation can sometimes be uncomfortable and lead to a stomachache.

Why the Nerves Activate

When the large intestine is full, the walls of the bowel can become stretched or tense. This stretch can activate the nerves located within the bowel wall, leading to a feeling of discomfort or pain. These nerves are part of the enteric nervous system, often referred to as the "second brain" of the gut, and play a crucial role in regulating the functions of the digestive system. The activation of these nerves can manifest as a stomachache, and can also cause other symptoms such as bloating or cramping.

The Role of the Large Intestine

The large intestine, or colon, is a vital part of the digestive system responsible for absorbing water and electrolytes from the remaining indigestible food matter and forming stool. When the colon is full and the nerves are activated, it often feels as if you need to poop urgently. This urgency can be due to the accumulation of waste and the subsequent pressure on the rectum, which can also contribute to the discomfort.

What Happens When the Gut is Full?

When the gut is full, the walls of the bowel can press on nearby organs, which can further contribute to the discomfort or pain. This pressure can cause the stomach or lower abdomen to feel full and tense, leading to a distinct sensation of needing to go to the bathroom. In some cases, this pressure can also affect the function of other organs, causing them to feel uncomfortable as well.

Why All is Back to Normal Once We Poop

The symptom of a stomachache or discomfort typically subsides once the poop is expelled from the body. This is because the process of defecation relieves the pressure on the bowels and the rectum, allowing the digestive system to return to a more normal and calm state. As the waste is eliminated, the nerves in the bowel walls can relax, and the sensation of needing to poop often disappears.

Common Factors Causing Stomachache Alongside Defecation

There are several common factors that can contribute to the stomachache or discomfort you may experience when you feel the urge to poop. These factors include:

Constipation: When the large intestine is not functioning optimally, it can lead to constipation, making it difficult to poop and causing discomfort. Diarrhea: On the other hand, diarrhea can also cause urgency and discomfort, as the stool passes through the large intestine more quickly than usual. Diet: Consuming foods that are difficult to digest or high in fiber can lead to discomfort. Stress: Emotional stress can impact the digestive system, causing more frequent or urgent bowel movements and associated discomfort. Medical Conditions: Certain medical conditions such as irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD) can also cause abdominal pain and discomfort.

Conclusion

When you experience a stomachache or discomfort when you feel the urge to poop, it is often a natural response to the body's need to eliminate waste. The process involves the activation of nerves in the large intestine and the pressure exerted on the bowel and nearby organs. Once the poop is expelled, the discomfort typically subsides, and the digestive system can return to a more normal state.

Stay Informed and Healthy

Understanding the natural process of defecation and the factors that might lead to discomfort can help you manage your digestive health better. If you experience persistent or severe pain, it is advisable to consult a healthcare professional for a proper diagnosis and treatment.