You should never attempt to eat chapstick. The chapstick products are not meant to be consumed but only for external usage. Nonetheless, you shouldn't become alarmed if you or your child accidentally swallows a small amount. Large quantities of chapstick consumed are likely to have specific adverse effects. The first symptoms you'll experience are mild diarrhea, moderate nausea, and mouth, throat, stomach, and eye irritation. Intestinal blockage and shortness of breath are some serious adverse effects.