Cause
Causes are numerous, but the more common ones include eating spoiled food, a sudden change in diet, lactose intolerance or intolerance to a food or additive, or simply overeating. Other causes include viruses like parvovirus or coronavirus, and bacteria such as Salmonella, Clostridium, and E. coli. Intestinal parasites or worms such as Giardia, roundworms, coccidia, and hookworms can cause diarrhea as well. Other causes include drugs such as aspirin or steroids, inflammatory bowel disease, endocrine disorders such as hyperthyroidism, kidney or liver disease, and cancer.