15 Causes of Diarrhea are - Bacterial infections - Viral infection - Parasitic infection - Toxin and poison-induced infections - Food poisoning - Food allergies i.e. lactose intolerance, Celiac disease - Radiotherapy - Malabsorption - Medicines e.g. Antibiotics, antacids, PPIs, antidepressants, chemotherapy agents - Intestinal diseases - Injury to stomach or gallbladder - GIT disorders - Artificial sweeteners e.g. Mannitol and Sorbitol - Dietary changes - Changes in sleeping schedule Treatment of Diarrhea - Anti-diarrheal medicines - Changes and adjustments in medicines - Lifestyle changes - Dietary changes - Intake of supplements - Rehydration - Probiotics