The red worms our reader has been finding in his toilet are earthworms, not intestinal parasites. That being said, if our reader is truly worried about his health, he needs to address those concerns with a medical professional who is licensed to give medical advice!

We think the creature our reader found in her toilet could be either a bloodworm or an earthworm. It is also possible that it is a different species entirely, but these are two of the most common worms found in toilets, and they share some resemblance to the organism our reader found.