Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Allergic reaction

An allergic reaction is an overreaction of the immune system to a substance called an allergen. Allergens include chemicals, foods, medicines, mold, plants, and pollen.

Symptoms of an allergic reaction can range from mild and annoying to severe and life-threatening.

  • Allergens can affect different tissues in the body, such as the airways, eyes, gastrointestinal tract, nose, lungs, and skin.
  • Some allergic reactions, such as hives or itching around an insect bite or where a plant or chemical touched the skin, affect only one area of the body.
  • Other allergic reactions may affect the whole body, causing itching all over, swelling, fainting, belly pain, nausea, vomiting, or difficulty breathing.
  • A severe allergic reaction (called anaphylaxis) can lead to shock and even death.

Allergic reactions may not occur the first time a person is exposed to an allergen. A person may become more sensitive to the allergen with each exposure.

COVID-19 Updates

Do you ever feel at times due to life being so busy you put your health on hold? Now is the time to take care of you! For many of our patients we have postponed your annual exam by moving it out a few months in response to COVID-19, but we still want to make sure we have the opportunity to take care of you from afar. If you are our patient and have not had the opportunity for us to review your cancer family history with you, or maybe you have just put this on hold, here is the opportunity for you to fill out your information in a few quick steps online to see if testing is right for you! This link will be posted to our website as well to access and to complete. So take control of your health today! We will be happy to direct you to right resources and follow up with you for any questions you may have.

OBGALS Logo