The two common ways they'll be able to diagnose you is by taking a really good food history and giving you an oral food challenge by giving you certain foods and seeing what happens in a medically safe and controlled environment.
Las dos formas más habituales para diagnosticar son: elaborar un buen historial de las comidas y hacer una prueba de tolerancia oral, comiendo determinados alimentos y ver qué ocurre dentro de un entorno médico seguro y controlado.