Most people are not allergic to insect stings and should recognize the difference between an allergic reaction and a normal reaction. This will reduce anxiety and prevent unnecessary medical expense.
The severity of an insect sting reaction varies from person to person. A normal reaction will result in pain, swelling and redness confined to the sting site. Simply disinfect the area (washing with soap and water will do) and apply ice to reduce swelling.
A large local reaction will result in swelling that extends beyond the sting site. For example, a sting on the forearm could result in the entire arm swelling twice its normal size. Although alarming in appearance, this condition is often treated the same as a normal reaction. However, because this condition may persist for two to three days, antihistamines and corticosteroids are sometimes prescribed to lessen the discomfort.
Fire ants, yellow jackets, hornets and wasps can sting repeatedly. Honeybees have barbed stingers which are left behind in their victim’s skin. These stingers are best removed by a scraping action, rather than a pulling motion which may actually squeeze more venom into the skin.
Almost all people stung by fire ants develop an itchy, localized hive or lump at the sting site, which usually subsides within 30-60 minutes. This is followed by a small blister within four hours. This usually appears to become filled with pus by 8-24 hours. However, the material seen is really dead tissue and the blister has little chance of being infected unless it is opened. When healed, these lesions may leave scars.
Treatment for fire ant stings is aimed at preventing secondary bacterial infections, which may occur if the pustule is scratched or broken. Clean the blisters with soap and water to prevent secondary infection. Do not break the blister. Topical corticosteroid ointments and oral antihistamines may relieve the itching associated with these reactions.
The most serious reaction to an insect sting is an allergic one. This condition requires immediate medical attention. Symptoms of an allergic reaction may include one or more of the following:
A severe allergic reaction, or anaphylaxis, can occur within minutes after the sting and may be life threatening. Symptoms may include:
Insect sting allergy is treated in a two-step approach. The first step is emergency treatment of the symptoms of a serious reaction. The second step is preventive treatment of the underlying allergy with venom immunotherapy. Life-threatening allergic reactions can progress very rapidly and require immediate medical attention.
Emergency treatment usually includes administration of certain drugs, such as epinephrine, antihistamines, and in some cases, corticosteroids, intravenous fluids, oxygen and other treatments.
Once stabilized, patients are sometimes required to stay overnight at the hospital under close observation.
Injectable epinephrine for self-administration is often prescribed as emergency rescue medication for treating an allergic reaction. People who have had previous allergic reactions and rely on epinephrine must remember to carry it with them at all times. Also, because one dose may not be enough to reverse the reaction, immediate medical attention following an insect sting is recommended.
The long-term treatment of insect sting allergy is called Venom Immunotherapy. It is a highly effective program of weekly injections, administered by your Allergist. Venom Immunotherapy is the only treatment which has been proven to prevent further allergic reactions to insect stings.
Venom immunotherapy involves administering gradually increasing doses of venom which stimulate the patient’s own immune system to reduce the risk of a future allergic reaction to the same as the general population. In a matter of weeks to months, people who previously lived under the constant threat of severe reactions to insect stings can return to leading normal lives.
Knowing how to avoid stings from fire ants, bees, wasps, hornets and yellow jackets can lead to a more enjoyable summer for everyone. Stinging insects are most active during the summer and early fall, when nest populations can exceed 60,000 insects. Insect repellents do not work against stinging insects.
Yellow jackets will nest in the ground and in walls. Hornets and wasps will nest in bushes, tress and on buildings. Use extreme caution when working or playing in these areas. Avoid open garbage cans and exposed food at picnics. Also, try to reduce the amount of exposed skin when outdoors.
Effective methods for insecticide treatment of fire ant mounds use attractant baits consisting of soybean oil, corn grits or chemical agents. The bait is picked up by the worker ants and taken deeper into the mound to the queen. It can take weeks for these insecticides to work.
If you have questions about insect stings, feel free to contact our offices. One of our staff would be happy to answer your questions and discuss different treatment options offered at Allergy & Asthma Clinics of Ohio.