In general, wax is not poisonous. If a child eats a small amount of crayon, the wax will pass through the child's system without causing a problem. However, eating large amounts of wax or crayons can lead to intestinal obstruction.
Reviewed last on: 1/22/2007
Eric Perez, MD, Department of Emergency Medicine, St. Luke's-Roosevelt Hospital Center, New York, NY. Review provided by VeriMed Healthcare Network.