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- Allergies - Symptoms and causes - Mayo Clinic
Allergies also can happen due to certain foods and medicines that don't cause reactions in most people The immune system makes protective proteins called antibodies that attack invaders such as germs But with allergies, the immune system makes antibodies that mark a specific allergen as harmful, even though it isn't
- Hay fever - Symptoms and causes - Mayo Clinic
Overview Hay fever, also called allergic rhinitis, causes cold-like symptoms These may include a runny nose, itchy eyes, congestion, sneezing and sinus pressure But unlike a cold, hay fever isn't caused by a virus Hay fever is caused by an allergic response to a harmless outdoor or indoor substance the body identifies as harmful (allergen)
- Milk allergy - Symptoms causes - Mayo Clinic
Milk allergy is an atypical immune system response to milk and products containing milk It's one of the most common food allergies in children Cow's milk is the usual cause of milk allergy, but milk from sheep, goats, buffalo and other mammals also can cause a reaction An allergic reaction usually happens soon after you or your child consumes milk Symptoms of milk allergy range from mild
- Pet allergy - Symptoms causes - Mayo Clinic
Skin symptoms Some people with pet allergy also may have skin symptoms, a pattern known as allergic dermatitis This type of dermatitis is an immune system reaction that causes skin swelling and irritation Direct contact with an allergy-causing pet may trigger allergic dermatitis, causing symptoms, such as: Raised, discolored patches of skin called hives Eczema Itchy skin
- Egg allergy - Symptoms causes - Mayo Clinic
The same immune system reaction that causes egg allergy also can cause other health conditions If you or your child has egg allergy, you or your child may be at higher risk of: Allergies to other foods such as milk, soy or peanuts Allergies to pet dander, dust mites or grass pollen Allergic skin reactions such as atopic dermatitis
- Food allergy - Symptoms and causes - Mayo Clinic
Overview Food allergy is an immune system reaction that happens soon after eating a certain food Even a tiny amount of the allergy-causing food can trigger symptoms such as hives, swollen airways and digestive problems In some people, a food allergy can cause severe symptoms or even a life-threatening reaction known as anaphylaxis
- Allergies - Diagnosis and treatment - Mayo Clinic
Your family's history of allergies and asthma, including specific types of allergies, if you know them All medicines, vitamins and other supplements you take, including doses Questions to ask your healthcare professional Some basic questions to ask your healthcare professional include: What is the most likely cause of my symptoms?
- Drug allergy - Symptoms and causes - Mayo Clinic
Overview A drug allergy is the reaction of the immune system to a medicine Any medicine — over-the-counter, prescription or herbal — can trigger a drug allergy However, a drug allergy is more likely with certain medicines The most common symptoms of drug allergy are hives, rash and fever But a drug allergy also may cause serious reactions This includes a severe, life-threatening
- Alpha-gal syndrome - Symptoms and causes - Mayo Clinic
Alpha-gal syndrome causes mild to intense allergies to red meat, such as beef, pork or lamb It also can cause reactions to other foods that come from mammals, such as dairy products or gelatin Some people may have alpha-gal syndrome and not know it There are people who have serious allergic reactions, called anaphylactic reactions, for no known reason Because the reactions can be delayed
- Dust mite allergy - Symptoms causes - Mayo Clinic
Dust mite allergy is an allergic reaction to tiny bugs that live in house dust Symptoms of dust mite allergy are like those of hay fever, such as sneezing and runny nose Many people with dust mite allergy also have symptoms of asthma, such as wheezing and trouble breathing Dust mites are related to ticks and spiders Dust mites are too small to see without a microscope They eat skin cells
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