This poisoning is from eating or swallowing lip moisturizers containing para-aminobenzoic acid.
For information regarding allergic reactions to this substance, see para-aminobenzoic acid allergy.
Para-aminobenzoic acid is a naturally occurring substance that can absorb ultraviolet (UV) light. It is often used in sunscreen products, including lip moisturizers containing sunblocks.
Lip balm and moisturizers containing a sunblock. Chapstick is one name brand.