The most likely triggers for acute urticaria/ hives are allergies to
pets, horses, latex and foods, such as shellfish and nuts, bee
or wasp stings
, allergies to
medicines, viral infections, such as glandular fever and herpes, dental and sinus infections, fungal infections, blood transfusions and vaccines. In your case, it may be due to the rabbit that you have recently got that may be causing the hives.