Arizona Asthma and Allergy Institute can evaluate for insect allergy when appropriate. A normal response is small local inflammation at the site of the insect bite or sting that may have some itching involved. However, an allergic reaction can occur in many individuals if their immune system is sensitized to that particular insect venom.
Allergic reactions to insects can be separated into 2 categories:
Large Local Reactions
Swelling at the site of bite or sting that can be several centimeters in diameter. This generally peaks in size 48 hours later and can persist for 5 to 10 days.
These reactions can have large local reactions but also spread beyond the site of insect bite or sting and could cause hives anywhere on the body, respiratory difficulty, throat swelling and possibly anaphylactic shock (drop in blood pressure).
Common insects which cause reactions