Why allergy happens

Why Allergy Happens | Cause and Treatment

An allergy happens when our immune system reacts to a foreign substance that is generally not harmful to our body. These foreign substances are called allergens. These may include some food, pollen, or pet itching.

In other words, Allergies occur when your immune system reacts to foreign substances. Such as pollen, bee venom, or pets.

Your immune system produces substances known as antibodies. When you have an allergy, your immune system makes antibodies that indicate a specific allergen, although it is not. When you come in contact with allergens, your immune system’s response can cause your skin, sinuses, airways, or digestive system to become inflamed.

The severity of an allergy varies from person to person and can range from mild irritation to anaphylaxis – a potentially fatal emergency. Although most allergies cannot be cured, treatment can help relieve your allergy symptoms.

Types of Allergies

  • Pet Allergy
  • Pollen Allergy
  • Drug Allergy
  • Food Allergy
  • Insect Allergy
  • Latex Allergy
  • Mold Allergy

Now we explain why Allergy Happens it’s Cause and Treatment

01. Pet Allergy

Allergies to pets with fur are common. It is important to know that there is no hypoallergenic breed of dog or cat.


  • Sneeze
  • Runny nose
  • Itching, redness or closed eyes
  • Nose congestion
  • Itchy nose, mouth or throat
  • Postnasal drip
  • Cough
  • Facial pressure and pain
  • Waking up again and again
  • Swollen, blue skin under your eyes
  • Repeated rubbing of the nose in a child

Skin symptoms:

Some people with a pet allergy may also experience skin symptoms, a pattern called allergic dermatitis. This type of dermatitis is a reaction of the immune system that causes inflammation of the skin. Direct contact with allergic pets can trigger allergic dermatitis, which can be caused by signs and symptoms, such as:

  • Raised, red skin spots (hive)
  • Eczema
  • Itchy skin

02. Pollen allergy

The most common trigger for seasonal allergies is pollen. Many people know pollen allergy as “hay fever”, but experts commonly call it “seasonal allergic rhinitis”.

Everyone has a different immune system and allergies to jirgas can cause different signs and symptoms. This means that allergies can be difficult to diagnose. If you think you may have an allergy, keeping a record of your symptoms can help you and your doctor understand what is causing your symptoms.

Keep a record of your symptoms:

Keep the record to recognize Why Allergy Happens Keep a diary explaining your symptoms and when and where they occur. Your diary may include information on whether you have symptoms:

  • Indoors, outdoors, or both
  • For a short time or more
  • At night, during the day or when you are awake
  • At a particular time of year
  • Close to animals
  • After being bitten or bitten by an insect
  • When you have a special meal
  • When you go over the counter after taking a certain medicine,
  • on a prescription or from a pharmacy or supermarket
  • After taking herbal medicine.
  • Asthma from pollen allergy

Pollen can breathe into the lungs and in some people directly causes asthma. This may be unrelated to the symptoms of hay fever. Asthma symptoms include:

  • Chest tightness or pain
  • Shortness of breath
  • Difficulty breathing
  • Wheezing – the sound of whistling while breathing
  • Cough.
  • Symptoms of hay fever from pollen allergy
  • Hay fever is also known as seasonal allergic rhinitis, as the symptoms appear when it is pollen season. Hay fever actually refers only to allergies caused by grass pollen, but the term is now also used to describe the symptoms of rhinitis (inflammation of the mucous membrane inside the nose).

Pollen allergies usually cause symptoms of hay fever, which include:

  • Sneeze
  • Itching and runny nose
  • Red, itchy and watery eyes
  • The itchy roof of the mouth or throat
  • Cough
  • Nasal congestion
  • Block sinus
  • Extreme fatigue

03. Drug allergy

Real drug allergies are found in very few people. Most drug reactions are not allergic but have side effects of the drug’s properties. Determining the cause of a drug reaction is usually based solely on the patient’s history and symptoms. Sometimes skin tests are also done for drug allergies.


  • Skin rash
  • Hives
  • Itchy, watery eyes
  • Itching
  • Fever
  • Swelling
  • Shortness of breath
  • Wheezing
  • Runny nose

04. Food allergy

There are different types of food allergies. There is a difference between IgE-mediated allergy, non-IgE-mediated allergy, and food intolerance.


  • Itching or itching in the mouth
  • Hives, itching, or eczema
  • Swelling of the lips, face, tongue, and throat or other parts of the body
  • Wheezing, runny nose, or difficulty breathing
  • Abdominal pain, diarrhea, nausea, or vomiting
  • Dizziness, lightheadedness, or fainting

05. Insect allergy

Bees, wasps, hawthorns, yellow jackets, and fire ants are the most common insects that cause allergic reactions.

Non-stingy insects can also cause allergic reactions. Like most common cockroaches and insects, the dust is small. Allergies to these two pests can be the most common cause of allergies and asthma throughout the year.


  • Itching, itching, or hives on the skin
  • Swelling of the lips, tongue, or throat
  • Shortness of breath, difficulty breathing or wheezing (whistling during breathing)
  • Dizziness and/or fainting
  • Abdominal pain, vomiting, bloating, or diarrhea
  • Feeling we have ‘Run out of gas’ emotionally

06. Latex allergy

Latex allergy is an allergic reaction to natural rubber latex. Natural rubber Latex Gloves, balloons, condoms, and other natural rubber products contain latex. Latex allergies can be a serious health risk.


  • Sneezing
  • Runny nose
  • Wheezing
  • Cough
  • Itchy, watery eyes
  • Scratchy throat
  • Difficulty breathing

07. Mold allergy

Mold and mildew are fungi. Because cookies grow both indoors and outdoors, allergic reactions can occur throughout the year.


  • Sneezing
  • Runny or stuffy nose
  • Cough and postnasal drip
  • Itchy eyes, nose and throat
  • Watery eyes
  • Dry, scaly skin

Allergy treatments

The best way to avoid allergies is to stay away from anything that triggers a reaction. If this is not possible, treatment options are available.


Depending on your allergies, medications can help lower your immune system’s response and reduce symptoms. Your doctor may prescribe pills or liquids, nasal sprays, or over-the-counter or over-the-counter medications.

Allergy treatment often involves medications such as antihistamines to control the symptoms. Medications may be over-the-counter or over-the-counter. What your doctor prescribes depends on the severity of your allergy.

  • antihistamines like diphenhydramine (Benadryl)
  • corticosteroidsdecongestants (Afrin, Suphedrine PE, Sudafed)
  • leukotriene modifiers (Singulair, Zyflo)
  • cetirizine (Zyrtec)
  • loratadine (Claritin)
  • cromolyn sodium (Gastrocrom)


Many people choose immunotherapy. This includes several injections over a few years to help the body get used to your allergies. Successful immunotherapy can prevent allergy symptoms from returning.

Emergency epinephrine:

If you have a severe, life-threatening allergy, take an emergency epinephrine shot. Pills fight allergic reactions until medical help arrives. Common brands of this treatment include EpiPen and TwinJet.


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We try to well explain Why Allergy Happens, Cause and Treatment of all type allergies. you are advised to pelase visit your docotr if you feel any sypmtom of allergy which has been explained above very clearly.

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