Bees have barbed stingers and leave their stinger in the skin. The bee dies shortly afterward. Wasps and hornets do not have barbed stings and therefore do not leave it in the skin. The severity and duration of a reaction can vary from one person to another. In addition, reactions to a sting may differ between occurrences.
Most people experience a local nonserious allergic reaction to venom.
However, depending on the location and number of stings received a serious reaction can occur. Use ice to reduce swelling. See a physician if there is any concern about an allergic reaction or if several stings are received.