Allergic reactions occur when the body’s immune system reacts to a specific substance such as pollen, pet dander, medications or certain foods. Symptoms can range from mild itching or sneezing to more severe reactions such as anaphylaxis. It is important to seek medical attention for severe allergic reactions.

Allergic Reactions FAQ


What causes allergic reactions?

Allergic reactions are caused by an overreaction of the immune system to a substance that is normally harmless, such as pollen or certain foods.

What are the symptoms of severe allergic reactions?

Severe allergic reactions can cause swelling, difficulty breathing, rapid heart rate, and a drop in blood pressure. This is known as anaphylaxis and requires immediate medical attention.

How are mild allergic reactions treated?

Mild allergic reactions can often be treated with over-the-counter antihistamines such as Benadryl, which can help alleviate symptoms like itching, sneezing, and hives.

Are allergic reactions common?

Allergic reactions are fairly common, with millions of people experiencing symptoms such as seasonal allergies, food allergies, or reactions to insect stings.

Can allergic reactions be prevented?

While it may not be possible to prevent all allergic reactions, avoiding known allergens, such as certain foods or environmental triggers, can help reduce the risk of an allergic reaction.

What should I do if I experience a severe allergic reaction?

If you experience symptoms of a severe allergic reaction, such as difficulty breathing or swelling of the throat, seek immediate medical help and, if available, use an epinephrine auto-injector if prescribed.

Can children have severe allergic reactions?

Yes, children can also experience severe allergic reactions. It is important for parents and caregivers to be aware of any known allergies and have a plan for addressing allergic reactions in children.

How are allergic reactions diagnosed?

Allergic reactions can be diagnosed through a combination of a physical examination, medical history, and possibly allergy testing to identify specific triggers.

Are there long-term treatments for allergic reactions?

For individuals with chronic allergic reactions, long-term treatments such as allergy shots (immunotherapy) or ongoing medication management may be recommended by a healthcare professional.

Can allergies cause skin reactions?

Yes, allergies can cause skin reactions such as hives, dermatitis, or eczema. These reactions are often an immune system response to allergens coming into contact with the skin.

What should I do if I suspect an allergic reaction to a medication?

If you suspect an allergic reaction to a medication, stop taking the medication and seek medical advice as soon as possible. Be sure to inform your healthcare provider about any known allergies or previous reactions to medications.

Can stress trigger allergic reactions?

Stress may not directly trigger allergic reactions, but it can worsen the symptoms of existing allergies due to its impact on the immune system and bodily functions.

Can I develop new allergies later in life?

It is possible to develop new allergies later in life, even if you have not had allergies previously. This can occur due to changes in the immune system or exposure to new allergens over time.

Are there different types of allergic reactions?

Different types of allergic reactions include immediate hypersensitivity reactions (e.g., anaphylaxis), delayed hypersensitivity reactions (e.g., contact dermatitis), and other specific immune responses to allergens.

Is it safe to buy allergy medications online?

It is safe to buy allergy medications online from licensed and reputable pharmacies. Ensure that you purchase from trustworthy sources and follow proper dosage and usage instructions.

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Information provided by Maryam Abdullahi-Mahdi. Reviewed by Mr. Matthew Liew