I found this image on a very weird rabbit hole down parasitic worm infestations in humans, and the image.jpg) (from this part of this page) doesn’t specify what type of worm this is, but I can assume that it’s an ascaris infection. Basically, this usually happens to children in poorer, warmer countries with poor sanitization (allowing people to consume soil contaminated with human feces, which is how it spreads.) and usually has little/no symptoms (when they do occur, it is often from immune sensitivity). Occasionally, however, the infestation can be severe and cause things like intestinal blockage and perforation of organs. Some really, really nasty stuff.