Local Reactions

Local reactions to a wasp sting are the most common side effects. Symptoms include pain, swelling, warmth and redness at the site. Itching may also be present. Larger reactions can emulate nausea or tiredness.

Systemic Allergic Reactions

A full body allergic reaction can occur in people who have produced a type of antibody known as IgE. Symptoms include hives and flushing of the skin, difficulty breathing, and narrowing of the bronchial passages. In severe cases, hyptotension and circulatory disturbances occur. Breathing difficulty can progress to fatal cardiorespiratory arrest.

Toxic Reactions

These occur when multiple stings produce large amounts of venom. Symptoms can include fever, nausea, vomiting, diarrhea, headache, fainting or dizziness, and convulsions.

Delayed Reactions

Delayed reactions are uncommon and can occur days to weeks after the sting. Symptoms include inflammation of the brain, nerves, blood vessels, or kidneys, as well as blood-clotting disturbances.

Serum Sickness

Serum sickness occurs a week to 10 days after a sting and may cause itching, rash, fever, joint pain, fatigue and swollen lymph nodes.

Source:

Bee and Wasp Stings: Causes, Symptoms, Diagnosis, and Treatment

Basic First Aid: Wasp Sting

More Information:

University of Missouri Extension: Bees and Wasps

Wasps and Sting Prevention: Prevention and treatment of wasp stings