crystal,
Allergy gene is all connected one, may manifest in different forms, like eczema, sinus, asthma, food allergies, etc. etc. Most people not aware that asthma and eczema are connected to the same gene (or something like that, in my layman terms that's how I understand la, hor. Heheh) So once you have someone with asthma or eczema in the family, chances are the genes will pass down.
And like what I told you before, meimei's reaction may not happen the first time she eats something. Claire only displayed an allergic reaction to egg the 4th or 5th time she ate it.
Only thing is must be careful and conservative when giving food to her. Or see if it is not food allergy after all.
But what I was told by doctor is that food allergy manifests very fast, usually one or two hours after taking the problem food. So you think back over when it all started yesterday, if a couple of hours before she was taking some food, that food might be the cause.
Hope meimei feels better soon!