Bile Salt Diarrhea: This condition occurs when bile salts are not properly reabsorbed in the intestine, leading to diarrhea. After gallbladder removal, the bile ducts directly release bile into the intestine, which can cause an imbalance in bile salt concentration, potentially leading to diarrhea.

Irritable Bowel Syndrome (IBS): Changes in bowel habits, including diarrhea, can occur after abdominal surgery, including cholecystectomy (gallbladder removal). Stress and changes in bowel function post-surgery might trigger or exacerbate IBS symptoms.
Small Intestine Bacterial Overgrowth (SIBO): This condition involves an abnormal increase in the bacteria population of the small intestine, which can lead to diarrhea, among other symptoms. Post-surgical changes in intestinal motility and anatomy might predispose to SIBO.
Malabsorption: After gallbladder removal, the body might have difficulty absorbing fats and fat-soluble vitamins due to the altered bile delivery system, potentially leading to diarrhea.

Celiac Disease: An autoimmune reaction to gluten that can cause diarrhea, among other symptoms. Although less common, it's crucial to diagnose due to the significant impact of untreated celiac disease on health.
Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease and ulcerative colitis can cause chronic diarrhea. While not directly related to gallbladder removal, these conditions require early diagnosis and treatment to prevent complications.
Lactose Intolerance or Other Food Intolerances: Increased sensitivity to lactose or other foods post-surgery could lead to diarrhea. Identifying and managing these intolerances is essential for symptom relief.

Short Bowel Syndrome: Although rare, if a significant portion of the small intestine is removed or not functioning properly during or after surgery, it can lead to severe malabsorption and diarrhea.
Gastrointestinal Hormonal Imbalance: Rarely, hormonal changes post-surgery can affect bowel motility and secretion, leading to diarrhea.
Pancreatic Insufficiency: If the pancreas is not producing enough digestive enzymes, it can lead to malabsorption and diarrhea. This condition is more common in patients with pancreatic disease but can be a rare complication of gallbladder surgery.