When someone feels the urge to have a bowel movement immediately after eating, it is often due to the gastrocolic reflex, a normal digestive response. Dr. Anthony Salhab, a physician on TikTok, explains that this reflex occurs when the stomach stretches during a meal, sending signals to the brain, which then tells the colon to contract. This natural process helps the body make room for incoming food by moving older waste through the colon. Contrary to common belief, the bowel movement is not caused by the food just eaten, but by previously digested material being pushed out.

The gastrocolic reflex is not a disease or disorder; rather, it’s a routine part of how the gastrointestinal tract functions. It typically goes unnoticed in many people, but for others, particularly those with irritable bowel syndrome (IBS), the reflex can be stronger and more noticeable. Individuals with IBS may experience intense abdominal cramping, pain, or even diarrhea shortly after meals due to these heightened colon contractions. This increased sensitivity can make everyday eating uncomfortable and disruptive.

Managing symptoms related to a sensitive gastrocolic reflex involves lifestyle and dietary adjustments. Eating smaller meals more frequently, identifying and avoiding trigger foods, managing stress, and maintaining overall digestive health can help ease discomfort. If symptoms are severe or persistent, medical advice should be sought to rule out underlying conditions and develop a personalized treatment plan.