Some people may have a severe allergic reaction to a wasp sting known as anaphylaxis . It is a medical emergency and can be fatal if not treated.

While red marks, welts ... Other symptoms of hornet and wasp stings include: Signs of an allergic reaction include flushing, hives, dizziness, trouble breathing, and loss of consciousness.

How can you tell if a bite or sting is serious? According to Pramod Kelkar, MD, an allergist and immunologist in Maple Grove, Minn., reactions to insect bites fall into three categories ...

but it can also be triggered by wasp and bee stings, natural latex and drugs like penicillin, as well as other allergenic foods like eggs, milk, sesame seeds and kiwi fruit. For some people ...