If a person is allergic to the substance, a skin reaction usually occurs. An allergic reaction has no long-term effects if the trigger is avoided. Many allergies are mild and pose little threat to the affected person. Some allergies are life threatening and may cause death. Allergic reactions are not contagious and pose no risk to others.
Anxiety can increase the severity of the reaction.
If it is an insect stinger, for example, this can often be removed. The stinger should not be squeezed in this situation. This causes the release of more bee venom, which is probably the trigger. The person should be watched closely to see if he or she gets worse. Prescription medications may be needed in some cases to open the airways.