Doctor insights on:
Lupus And Insect Bites
I have a large, itchy red and purple bruise on my leg. It started out small and light pink and I thought it was an insect bite. I have lupus too?
Insect bites are from mosquitos, spiders, flies, ticks, and other species that use their mandibles (jaws) to attach to a person or other animal. They can then suck blood out of their "prey" and leave saliva proteins that cause itching and swelling. Other insect species, like bees, yellow jackets, wasps, hornets and fire ants actually inject venom into their prey and can not only cause localized pain and swelling, but severe, acute allergic reactions in ...Read more
Parasites: Cockroaches frequently feed on human feces, and therefore they can disseminate cysts of enteric protozoans in the environment if such feces are contaminated (7, 16, 24, 25, 30, 31, 32). The important epidemiological role of cockroaches in transmission of intestinal entamoeba histolytica-associated amoebiasis was demonstrated in 1971 (25) and in giardiasis in 1981 (16). ...Read more
Is it infected?: Without physically examining your insect bite, there is only a medical guess as to what is triggering the weeping. Is it infected? This would be the 1st concern--addressing the infection is the only solution here. If the weeping is watery clear, then perhaps this is more of an allergic-type reaction that might respond to oral antihistamines such as allegra (fexofenadine). Call md if infected or not better soon. ...Read more
Unlikely: There are many ways to try to treat or soothe insect bites, but applying anything warm is not one of them. With most insect bites, there is a histamine release which causes itching and redness & anything warm will make this worse. Applying a cool compress, an OTC steroid cream (2 times a day) may help with this. Benadryl (diphenhydramine) or another antihistamine may help with the itch. ...Read more