Being allergic to bee venom is different to being allergic to bee-products. Propolis is made from bee's saliva and pollen, resin and plant extracts. A bee's sting contains the toxin melittin and is meant to discourage potential threats from coming close to the hive and queen bee. It is meant to induce an extremely painful and uncomfortable reaction. A bee uses it's saliva and mixes it with tree resin and pollen to make glue or propolis to patch up it's hive. Propolis exists to keep the hive safe from microbial contamination.