After a night's sleep, waste processed by the digestive system accumulates in the colon. Following the body's biological rhythm, colon contractions tend to be more active in the morning to expel waste. This is a common reason for the urge to have a bowel movement in the morning.

According to the Cleveland Clinic (US), a person typically sleeps 6-8 hours each night without needing to wake up to use the restroom. However, frequent nighttime and increased morning urination might result from consuming excessive fluids, alcohol, or caffeine the night before.

Individuals who frequently have morning bowel movements often consume foods high in added sugar, insoluble fiber (nuts, dried fruit, popcorn), greasy dishes, dairy, and spicy foods.

Eating spicy chili can cause digestive upset. *Anh Chi*

Diuretic medications increase body water content, leading to nocturia (nighttime urination). This condition can also stem from bladder obstruction, swelling, infection, bladder pain, diabetes, or high blood pressure. Moreover, eating or drinking immediately after waking up can distend the stomach, triggering the gastrocolic reflex and causing morning bowel movements.

Elevated morning cortisol levels can stimulate bowel movements. As people age, the body produces less antidiuretic hormone (a hormone that helps retain water), leading to increased nighttime urine output. EveryDay Health explains this as a reason for needing to use the restroom upon waking.

According to EveryDay Health, waking up frequently to use the restroom may indicate an underlying issue such as irritable bowel syndrome (IBS) or an infection. Inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis, is characterized by chronic inflammation that damages the digestive tract and can alter a person's bowel habits. Common accompanying symptoms include pain, fever, blood in stool, or unexplained weight loss.

On Heath (US), doctors suggest that excessive stress can impact bowel habits, causing individuals to wake up with an urge to defecate. This connection relates to the gut-brain axis, where stress hormones stimulate the intestines and can trigger the need for a bowel movement.

Anh Chi (Compiled)