[Nomentatus]

To the extent that you mean IgE allergies, ordinary medical care is rather sound; but where non-IgE sensitivities-you-can-still-die-from are concerned, practitioner knowledge is much thinner on the ground,and the science far more recent. You won't find much in textbooks, just journal articles. Look into MCAS (mast cell activation syndrome) and Dr. Afrin's book "Never bet against Occam" is the best starting point for that; although one point of view. Note that some usually-missed-no-matter-how-many-doctors-you-see diagnoses (esp in the young) such as Anylosing Spondylitis and Ehlers-Danlos Syndrome involve such sensitivities. Whether you children have these are not, they'll almost always be quick to reassure you they don't. Extraordinarily severe underdiagnosis (90%) in both cases.