IGHE and cutaneous mastocytosis: One child developed an IgE‐mediated allergy with the culprit food over time: she had a confirmed typical FPIES to CM until the age of 3 without any sensitization, and had thereafter developed an immediate urticaria and rhinoconjunctivitis after ingestion of CM at 5 years old, with a positive SPT and increased CM's IgE: 10.9 kU/L.