Insect and Spider Bites and Stings

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Bites and stings from most common insects, such as mosquitoes, gnats, fleas, flies, and ants, as well as from common spiders, can cause itchy welts on arms and legs. A bee, wasp, or hornet sting can cause swelling and sting at the site. Usually, bites and stings are no more than an annoyance and cause only slight local swelling and irritation.

There are exceptions, however, such as a bite from a venomous spider like the brown recluse or black widow spider, or a severe allergic reaction to a bee sting. A bite from a tiny deer tick may cause a large circular lesion that progress into a rash of small round lesions. The deer tick is the insect responsible for transmitting Lyme disease, and the characteristic rash is often the first sign of that illness.

If you are stung by a bee, wasp, or hornet, or bitten by an insect you suspect may be poisonous (such as a black widow or brown recluse spider), emergency medical treatment may be necessary. If you know you are allergic to bee venom, seek immediate medical care in the event of a sting. At any time, if you develop respiratory symptoms, such as wheezing or difficulty breathing, have someone take you immediately to the emergency room of the nearest hospital. People rarely have a problem with a first bee sting. However, if you have a family history of allergies, or if you exhibit a strong reaction to a first bee sting, you may be more likely to develop a serious allergic response after a later incident.

General recommendations for insect and spider bites and stings

Preventive measures for insect and spider bites and stings

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