The bottom line. So, smoking probably doesn't make you poop, at least not directly. There's a whole host of other factors that might be responsible for this sensation of urgency to visit the toilet after smoking. But smoking does have a major impact on your gut health.

Does smoking cause loose stools?

Smoking cigarettes: Nicotine can cause loose stools. Morning diarrhea may occur if a person smokes before they go to bed or first thing in the morning. Drinking too much alcohol: Alcohol can also cause loose stools.

Why do cigarettes make you lose weight?

Smoking's effect on body weight could lead to weight loss by increasing the metabolic rate, decreasing metabolic efficiency, or decreasing caloric absorption (reduction in appetite), all of which are associated with tobacco use. The metabolic effect of smoking could explain the lower body weight found in smokers.