Worms in the Stomach: Why It's Highly Unlikely & What Happens

Worms cannot crawl inside a man's stomach under normal circumstances. The human digestive system is designed to process food, not allow foreign objects such as worms to enter. The stomach contains strong acids that help break down food, and the digestive tract has various mechanisms to prevent foreign objects from entering. Moreover, the human immune system would likely detect and destroy any worms that might accidentally enter the digestive system.