Intestinal tapeworms generally don't cause any complications. However, if a tapeworm grows big enough, it can block your appendix, which can lead to appendicitis, an infection in your appendix. A tapeworm can also block the pancreatic duct, which transports digestive fluids from your pancreas to your intestine or your bile ducts, which in turn transport bile from your gallbladder and liver to your intestines.
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