Allergy and friend advice question?

Ok, I dont have any allergies so i dont know anything about them. But my friend is one of them over the top people who say their leg hurts really bad when its not that bad. But she said she is allergic to oranges and to cheese but she said she still eats them because they are nice, if she was allergic to them she shouldn’t be allowed to eat them. Also she said she is allergic to the cold but she can play in the snow so i asked her and she said she had gloves on so her hands were fine is anyone allergic to the cold and is it possible to actually go out in the cold without loads of layers on she even goes out in the cold and it has been freezing. She managed to walk home about 25 minutes with me today in the freezing weather with no gloves and no coat in her school uniform but she said she has pains through her hands and a pin like feeling but doesn’t everyone get that, she just told me she went in and started crying because it hurt so much and she has to put a special cream on her hands to make the pain from the cold go away. She also claims to be allergic to chocolate but only when she eats about 3 normal size bars she said she gets a rash after eating too much.
She is always saying like my toe hurts so bad and i have this thing with my knee that runs in the family and it means i have really weak knees and i know she is exgaggerating when she says stuff like this and it really annoys me how do i tell her in a nice way coz i dont want to hurt her feelings? Thanks and sorry for the really really long question.

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