It is a common misconception that White Castle hamburgers cause diarrhea. There is no scientific evidence to support this claim. In fact, the cause of diarrhea can be attributed to a variety of factors, including:

1. Infection: Diarrhea can be caused by a variety of infectious agents, including bacteria, viruses, and parasites. These infections can be transmitted through contaminated food or water, or through person-to-person contact.
2. Food intolerance or allergy: Some people may have an intolerance or allergy to certain foods, which can lead to digestive symptoms such as diarrhea. These reactions can be triggered by a variety of food components, including lactose, gluten, or certain types of proteins.
3. Medications: Some medications, such as antibiotics, can cause diarrhea as a side effect. This is because they can alter the balance of bacteria in the gut, leading to an overgrowth of certain types of bacteria that can cause diarrhea.
4. Stress: Stress and anxiety can affect the digestive system and can lead to diarrhea.
5. Other medical conditions: Diarrhea can also be a symptom of underlying medical conditions, such as inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), or celiac disease.

It is important to note that diarrhea can also be caused by a combination of these factors. If you are experiencing diarrhea, it is important to speak with a healthcare provider to determine the cause and receive appropriate treatment.

In conclusion, there is no evidence to suggest that White Castle hamburgers cause diarrhea. If you are experiencing diarrhea after eating at White Castle or any other restaurant, it is likely due to other factors such as infection, food intolerance, medications, stress, or an underlying medical condition.