![]() It is possible to have both a toxic reaction and an allergic reaction at the same time, but this rarely occurs. Hives and shortness of breath may occur in an allergic reaction, but not in a toxic reaction. Usually, symptoms lessen or go away within 48 hours. rapid swelling at the site of the sting.Signs and symptoms toxic reactions may include: Symptoms of a toxic reaction vary depending on the toxicity of the venom of the insect or spider, the amount of venom injected and the individual's tolerance for that particular venom. Some people who experience toxic reactions can become allergic to insect venom later. Local and toxic reactions can be seen in individuals who are not insect sting allergic. ![]() ![]() Toxic reactions are not caused by an allergic response, but rather by the effects of venom that acts as a poison. In the event of a sting from a poisonous spider or insect or multiple, simultaneous stings from otherwise non-poisonous insects (when a nest is disturbed or when Africanized honeybees are involved) a toxic reaction may result. If an anaphylactic reaction is suspected, give injectable epinephrine and an antihistamine (if available) and call 911 immediately. This reaction, involving multiple organ systems at the same time, most often begins within minutes of the sting, although it can occasionally begin an hour or so later. They may be accompanied by fatigue, low-grade fever, mild nausea and discomfort and are often misdiagnosed as cellulitis.Īnaphylaxis Anaphylaxis is the most severe insect sting reaction. These reactions often peak within 48 to 72 hours and last up to 10 days. Large local reactions are characterized by redness and swelling that extends from the sting site over a large surrounding area. Chemicals such as histamine are released that cause the tissue around the bite or sting to swell, turn red, itch and be painful. It makes specific allergic antibodies to fight the insect venom.
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