Histamine Release Symptoms


Histamine is a chemical in the body that is released when the body is exposed to an allergen. Allergens may include airborne allergens (such as pollen and dust mites), certain foods (such as peanuts and shellfish) or insect venom. Histamine is released in an effort to protect the body from an allergen; however, sometimes an overload of histamine can result in life-threatening symptoms.

Smooth Muscle Contractions

  • The release of histamine can cause smooth muscles around the lungs or intestinal tract to contract. Such contractions can make breathing difficult or can cause gastrointestinal distress.

Nervous System Response

  • Excess histamine can lead to nervous system reactions such as drowsiness and confusion.


  • Histamine can also cause inflammation that results in hives or inflamed airways.

Allergic Rhinitis

  • When an allergen is inhaled, histamine causes the blood vessels to become dilated, which in turn causes fluids to leak out of the facial tissues, resulting in watery eyes, runny nose, stuffy nose, sneezing and itching.


  • Individuals can be extremely allergic to certain substances such as pollen, insect venom, latex, food items and some medications. These individuals may suffer from anaphylaxis, a life-threatening condition, when excess amounts of histamine are released into the body. Symptoms of anaphylaxis include hives, itching, pale or flushed skin, dizziness, fainting, airway constriction, swollen throat, swollen tongue, rapid or weak pulse and stomach symptoms such as nausea, diarrhea or vomiting.

Related Searches


Promoted By Zergnet


You May Also Like

  • What Is Histamine?

    Histamine is a substance present in cells of the immune system. It is released when tissue is damaged and during an allergic...

  • What Is a Histamine Reaction?

    A histamine reaction can be triggered by a vast number of allergens including, pet dander, mold, and dust mites. Certain types of...

  • Cold Air Allergy

    Cold air allergy, also known as cold urticaria, is a response brought about by the reaction of the body system to a...

  • How to Correct My Histamine Levels

    Histamine is found in all human tissue and is released from the body cells as part of an allergic reaction. It can...

  • High Histamine Foods

    An allergic reaction prompts the release of many substances--including histamine—which triggers symptoms like itching, swelling and sneezing. This chemical also occurs naturally...

  • Histamine Blocker Foods

    Histamine is a chemical produced in the body when you're having an allergic reaction. It causes inflammation, runny nose, hives, itching, coughing,...

  • Signs of Too Much Histamine

    Histamine is a naturally occurring chemical inside a person’s body. When a person undergoes an allergic reaction, histamine is released. A severe...

Related Searches

Check It Out

This Is the Beauty Routine of a Yelp Sales Manager

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!