If from a single sting you show heightened sensitivity (maybe to s single type of bee?) and should think about keeping an epi pen close by?
Resource:
Bee Sting -- Bee Sting Allergy
Most people who are stung by these insects will develop a reaction at the site of the sting that will cause pain, swelling, redness and itching. A smaller percent of people -- about 10 to 15% -- also will experience larger areas of swelling, and the swelling can last up to a week. Rarer still are people who have full-blown allergic reactions that cause anaphylaxis. About .5% of children and 3% of adults will experience anaphylaxis after a stinging insect bite.
From: The Buzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz