This is something I found that might help.

Allergies to insect stings
There are many stinging insects found in Australia, and a surprising number of Australians are allergic to their stings. The most common allergic reactions occur with stings from bees, wasps and ants. The degree of allergy varies widely, however, most people are not considered ‘allergic’ to insect bites, experiencing only mild symptoms such as local itching and minor swelling.

Other people, though, may have severe allergic reactions when stung, and a number of deaths are recorded every year. Most stings tend to occur in summer.

The majority of insect stings only cause discomfort and result in local pain, itching, some swelling and redness at the site of the sting, and this is not considered an allergic reaction. Local treatment is generally all that is needed to treat this type of sting. In these cases, the area should be washed and disinfected and ice applied to relieve the swelling and general discomfort.

In cases where the swelling continues to expand, antihistamine or possibly steroid treatment may be needed. On rare occasions, the sting site may become infected and antibiotics may be required to treat the infection.

What is an allergic reaction?
The most serious reaction to stings is classed as an allergic reaction and the severity varies from person to person. The most serious of the allergic reactions is called anaphylaxis and can be fatal in many instances.

Signs of allergic reaction include:

rash and intense itching in areas other than the sting site;
puffy eyelids;
wheezing and difficulty in breathing;
difficulty in swallowing due to swelling of the tongue, and hoarseness; and
dizziness and fainting — this is a very serious reaction.

Severe allergic reactions generally occur within minutes of the sting, but may occur up to 24 hours after the sting. In cases of severe allergic reaction, prompt medical treatment is necessary.

Treatment of insect allergies
If stung by a bee or a wasp, do not pull or squeeze the sting that is left in the skin as this can cause more venom to be released. The sting should be removed by scraping it sideways with a fingernail, blunt knife or similar object.

Allergic reactions need to be treated with adrenaline. There are now self-injectable devices available for people with known reactions. These devices are already filled with adrenaline and should be injected into the muscle at the front of the thigh. These types of device hold only one dose, and people should be taken to hospital after the adrenaline shot — in case they need further doses and for specialist observation
Raven