Anne Murray, from Lanark, Scotland, is allergic to things like citrus and cinnamon. As she has severe asthma any exposure to these ingredients could kill her without immediate medical treatment.
She almost died in November 2016 when she smelt "pine cones impregnated with citrus" in a garden centre. Fighting to breathe, she grabbed her inhaler and ran out of the garden centre. Two days later she was still struggling to breathe and needed hospital treatment.
"I can't be anywhere near things that smell of Christmas, or eat anything Christmassy like mince pies or stollen cake" she says. "Just smelling a mince pie could kill me."
I assume I can eat whatever I like without falling violently ill. At Christmas especially I want to tuck into anything that's going without having to steer clear. It's tragic that some people can't be so free-and-easy.
Allergies generally seem to be increasing, both in childhood and in adulthood. Many adults are developing allergies they never had in childhood and despite a lot of research the cause is still unknown. There's a wide range of allergens, including soya beans, sesame, and tree nuts like almonds, walnuts and pecans.
Buying any food products must always be risky. You have to assume food labels are 100 per cent accurate about what is or isn't in the product and there are no inadvertent mistakes. Two women died after eating mislabelled food from Pret a Manger, which led to tighter food labelling laws.
It's easy for those of us without allergies* to take for granted our less complicated lives.
*I tell a lie. I have a slight allergy to wheat. If I eat anything containing wheat my nose starts running.