Thanks for writing to the forum!
Urticaria is usually triggered by allergens, such as drugs, foods, insect bites, inhaled substances, in respon
se to sunlight, cold, heat, stress, exercise, or a viral infection
. Other common
allergens are pollen, mold, dust, pet dander, or cosmetics.
In your case since this was associated with
vomiting it could be a food item you ate or a drug you took for something.
It is difficult to comment beyon
d this at this stage .