What is Allergy? Causes, Signs and Symptoms, Diagnosis and Treatment.

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Published 2018-07-07
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Chapters

0:00 Introduction
0:22 Causes of Allergy
0:55 Symptoms of Allergy
2:37 Diagnosis of Allergy
3:42 Treatment of Allergy


Allergy occurs when a person's immune system reacts to substances in the environment that are harmless for most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medicines.

A particular antibody called immunoglobin (IgE) causes allergic reactions. Antibodies are released to combat foreign and potentially harmful substances in the body.
IgE is released to destroy the allergen and causes the production of chemicals that trigger the allergic reaction.
One of these chemicals is called histamine. Histamine causes tightening of the muscles in the airways and the walls of blood vessels. It also instructs the lining of the nose to produce more mucus.
There are many types of anti-allergy medications. The choice of medication and how it is given depends on the severity of the reaction.
Long-acting antihistamines, These medications are available over the counter. They are meant to be taken for months at a time, even indefinitely. Most can be taken once a day and last for 24 hours.

All Comments (16)
  • @imliwati6308
    If there is family history of allergy what is the option? Help
  • Someone to just help me, i went to eye specialist, he told i have now chronic allergy reaction. Its itching and watery, painful afterwards. I have used many eye drops for example, Maxitrol, Oculust, dextracin and Alerchek. It can be okay for that duration, then afterwards it comes again and again. Am tired with it, it also include cough and sneezing. Can it be cure please?
  • Also an important treatment includes IV Epinephrine or Adrenaline for emergencies in cases of anaphylaxis.
  • Almighty Allah bless that all patients may become Heal up from all type of diseases especially mine father whome is caught by Allergic problem. Ameen
  • @nsmqteam3506
    i was infused in the hospital and two days afterwards, these skin rashes start developing on my skin . these rashes always occur after infusions .is it an allergy?
  • MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ HAS ALLERGIES. I PLAYED WITH MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ WHEN I WAS STILL YOUNG. HE HAS HIS OWN PLATE. MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ IS A NICE PERSON 🙏
  • I KNEW MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ HAS ALLERGIES WHEN I WAS STILL IN GRADESCHOOL DAYS.
  • MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ IS HAPPY WHEN I'M WORKING HARD..
  • MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ ASKED ME BACK IN 2016, "WHERE ARE YOU WORKING FOR LEC?". I TOLD MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ, I'M WORKING FOR Y.L. FISHING CORPORATION. MY FIRST COUSIN MICHAEL FRANCIS VELOSO MARQUEZ KNOWS THE OWNER OF Y.L. FISHING CORPORATION. IT'S THE YAP FAMILY BACKGROUND.
  • @idc4198
    Why am I learning about allergies in pe class. Just why.