Question: My mother is allergic to bee sting what causes the reaction

Roberto answered on 11 Nov 2018:

When a bee sting you, she also releases a small amount of venom. This venom normally has a very weak effect in the area of the sting. Some people, like your mum, are allergic to this venom, therefore their reaction to the sting is much worse than normal.
It really depends on the immunosystem of each person, some are allergic and some other no. I am sorry that your mum is allergic. She needs to be careful if she gets stung!