Katie Hutt, a mum from Cardiff, said strengthening allergy guidelines in schools in Wales would give children, parents and teachers “peace of mind”.
Her son, Yan, has more than 20 extreme allergies, including some that are airborne.
Hutt said she felt “incredibly lucky” that her son’s school made him feel safe but said it took “time and commitment” to make the necessary adjustments each year.
“We don’t have Benedict’s Law in Wales, so it’s down to the parents and the individual schools.”
After meeting Yan’s school two years before her son had been due to start, Hutt said it had become “rapidly clear” that it had not been fully prepared to deal with severe allergies.
But with the support of a particular staff member they were able to ensure Yan’s condition was taken seriously.
Yan, 10, said his friends in school had been “very protective” of him because of the severe nature of his allergies.
“Unless you live it day in, day out, or you’ve seen a child not be able to breathe from a tiny amount of food, it doesn’t really make sense.”
Hutt said simple things like opening windows, washing hands and not using certain cereal boxes or egg packets for crafting could make a difference.
Allergy awareness training and storing allergy pens should be an “absolute minimum” in schools, she said.