Pinworms | Symptoms | How Do You Get It | How To Treat It How To Prevent Them. This video is on Pinworms Explained - What Are Pinworms and How Can I Prevent Them? This video explains what the terms mean, who is susceptible to pinworms, how it is spread, symptoms, treatment as well as prevention tips. Pinworm infection is the most common type of intestinal worm infection in the United States. It is also one of the most common worldwide. While the infected person sleeps, female pinworms lay thousa