If you are allergic to insects, a sting can produce uncomfortable or even life-threatening symptoms. In susceptible people, a sting causes the body to produce a flood of histamine, a chemical that may cause swelling, itching, and rash. In a severe reaction, you may even have trouble breathing. A typical allergic reaction includes a red lump, pain, swelling, itching, and a rash. You may also run a fever, develop a headache, feel dizzy, or faint.
Some people develop an upset stomach and throw up.
Really dangerous symptoms include tightness in your chest or throat, and trouble breathing. If you experience chest pain, a tight throat, or trouble breathing and do not have emergency medicine, get to the hospital right away . A shot of this drug is needed as soon as the bite occurs. If you are allergic to bug bites and stings, carry a card, or wear a medical necklace or bracelet identifying your allergy. The card or tag should list your name, your doctor's name and phone number, and type of allergy you have.