The part of the colon lying in the left side of the abdominal cavity bends into a loop. Because of its shape, it is called the sigmoid colon. Some people have colons with multiple coils. This gives them a more twisted configuration. These are sometimes referred to as "tortuous" or "redundant" colons.
These twisted colons may pose a challenge for the person doing a colonoscopy. (It may be hard to traverse the organ to its full length.) But colons like these have no health implications. Specifically, there is no hard evidence to suggest that a tortuous colon is a cause of constipation.