When I was a child, I suffered from several severe food allergies (as I continue to), as well as asthma. Sometimes, the reactions would include all of the possible allergy symptoms listed below, in this excellent chart by FARE.
But at other times, one or more of the symptoms would be missing. This was particularly problematic when something I ate triggered an itchy mouth and throat and an asthma exacerbation, but no (or few) hives. Back then, some doctors assumed that hives were always present in allergic reactions to foods. This was a long time ago, and thanks to both advocacy and education groups, and research progress, we know more about the signs and symptoms to watch for. And they can occur individually, or in combination.
Thank you, FARE!