Types of Allergies And How to Identify Them

Allergies occur when your immune system reacts to foreign substances or foods that most people do not react to. There are various types of allergies with hundreds of reasons behind it.

Your immune system produces substances called “antibodies”. When you are allergic, your immune system produces antibodies that recognize a specific allergen as harmful, even if it is not. When exposed to allergens, the immune system’s reaction can cause inflammation of the skin, sinuses, respiratory tract, or digestive tract.

The severity of allergies varies from person to person, ranging from mild irritation to allergic reactions (life-threatening emergencies). Although most allergies cannot be cured, treatment can help relieve allergy symptoms.

Types of Allergies
Types of Allergies

Here are the most common types of allergies

Respiratory allergies

These types of allergies are allergic reactions caused by inhaling allergens through the respiratory tract. Once in the body, they can cause various changes and can aggravate and trigger the process of asthma and allergic rhinitis.


Contrary to what most people think, pet dander causes the least allergies. It is more likely to be related to urine, saliva and skin extracts. Because the particles are very small and present in the air, furniture, rugs, carpets, rugs, beds and sofas, people with this allergy will experience respiratory allergies even if the animal is not present.


Some respiratory allergies are related to the season of the year. In the weeks around spring, sneezing, runny nose and watery eyes are common when people come into contact with pollen. Allergies, on the other hand, are related to the weather, but not to a specific season; they can occur at any time of the year. Dust, moisture and mould are allergens that often cause respiratory allergies. Sometimes it is advisable to consult a medical professional. 

Related to other factors

Allergic respiratory reactions can be caused by burning smoke, cigarette smoke or transport pollution, perfumes, strong odours, flavours and solvents. This type of allergy can trigger asthma in people with this disease.

Ingestion or injection allergy


Food allergies can vary in severity, ranging from skin variations, diarrhoea, stomach pain and vomiting, to more serious problems such as anaphylactic shock. Anaphylactic shock is an extreme allergic reaction in which the airways swell, preventing the passage of air. This condition requires emergency assistance and often hospitalisation. 

Below is a list of foods considered most likely to cause allergies: shellfish, sesame, gluten, eggs, nuts. 


Like foods, some medications are administered orally and can trigger allergies in the most allergy-prone individuals. Depending on the severity of the allergic reaction, it can also cause anything from redness to anaphylactic shock, photophobia (difficulty looking at light), difficulty breathing, asthma and inflammation of the eyes and airways.  In these cases, at the first sign of an allergic reaction, immediate emergency care should be sought at the hospital. 

Care must be taken to ensure that the symptoms are not just side effects of the medication. It is therefore very important not to self-medicate and to consult a specialist frequently in order to have a clear definition of the side effects of the medication used. At doctoranytime you can find all kinds of specialists.

Like other types of ingestion or injection allergies, mosquito bites can vary in severity from itching to anaphylactic shock. 

Contact allergies

This group of allergies includes allergens that come into direct contact with the skin and cause skin irritation. Latex products, such as cleaning or procedure gloves, balloons and rubber bands, are some examples of products that can cause contact allergies. Other products include fabric softeners, specific components of creams and perfumes, metals such as copper and zinc, among many others. 

How to identify allergies and what to do

In addition to the symptoms presented, it is important to seek out an allergist, dermatologist, pulmonologist and other specialties that treat allergies. They will identify through conversation, the history of allergies and their cause. Often, in the case of contact allergies, specific tests, such as the “allergy test”, are performed to learn more about the specific components that cause allergies. 

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