Irritable Bowel Syndrome (IBS): This is the most common cause of chronic abdominal bloating, characterized by recurrent abdominal pain, bloating, and changes in bowel habits without any mechanical, inflammatory, or biochemical abnormalities.

Functional Dyspepsia: A condition where the stomach does not function normally, leading to symptoms like bloating, discomfort, and early satiety.
Small Intestine Bacterial Overgrowth (SIBO): An excessive growth of bacteria in the small intestine, which can lead to bloating, gas, and abdominal discomfort.
Lactose Intolerance: The inability to digest lactose, a sugar found in milk, leading to bloating, gas, and diarrhea after consuming lactose-containing products.
Celiac Disease: An autoimmune disorder where the ingestion of gluten leads to damage in the small intestine, causing bloating, diarrhea, and abdominal pain.

Ovarian Cancer: Although rare, ovarian cancer can present with persistent bloating, abdominal pain, and changes in bowel habits, making it crucial not to miss this diagnosis.
Gastric Cancer: Similar to ovarian cancer, gastric cancer can cause bloating and abdominal discomfort, and early detection is key to treatment.
Intestinal Obstruction: A blockage in the intestine that can cause severe abdominal pain, bloating, and vomiting, requiring immediate medical attention.

Gastroparesis: A condition where the stomach takes too long to empty its contents, leading to bloating, nausea, and vomiting.
Cystic Fibrosis: A genetic disorder that can cause digestive problems, including bloating and malabsorption, due to thick mucus production in the digestive tract.
Ehlers-Danlos Syndrome: A group of disorders that affect connective tissues, which can lead to gastrointestinal symptoms, including bloating and abdominal pain.
Mitochondrial Neurogastrointestinal Encephalomyopathy (MNGIE): A rare genetic disorder that affects the digestive system and nervous system, causing severe gastrointestinal symptoms, including bloating.