Foreign substances that provoke allergies are called allergens. Examples include grass, weed and tree pollens, substances present in house dust (particularly the house dust mite), fungal spores, animal products,
What are allergies?Allergies are an immune system reaction to a substance called an allergen. Your immune system sees the allergen as harmful and attacks it.What causes allergies?You may have allergies at certain times of the year or all year. The following are common allergies:...
No one knows for certain why certain people are allergic to certain things while others are not. We do know that allergies tend to run in families. If you have allergies, it’s very likely that at least one of your parents does too. Exposure to allergens at times when the body’s immu...
Iweala, MD, PhD JAMA Medical News in Brief FDA Greenlights First Treatment for Severe Food Allergies Emily Harris JAMA Food allergies are unpleasant and sometimes dangerous immune reactions to certain foods. Symptoms of Food Allergies People with food allergies may develop hives, itching, fl...
According to the CDC, ragweed pollen is one of the most common causes of seasonal allergies. A single plant can produce up to one billion pollen grains. These grains are very lightweight and float easily through the air. The immune system makes a special type of defense protein, called IgE...
When you breathe in an allergen, your immune system responds by releasing chemicals—also called “allergic substances”—that create inflammation in your nose. This inflammation opens the blood vessels in the lining of your nose and causes swelling and congestion.² Congestion from allergies is of...
What are allergies and why do we experience symptoms only during specific periods of the year?Immune System:The human immune system is composed of cells called the leucocytes that act as guards and keep a check on the foreign substances or objects that enter the body....
Fluticasone propionate belongs to a class of drugs called corticosteroids. It can help reduce inflammation. It is available as a cream or ointment, nasal spray, and inhaler. Due to this effect, people can use some form of fluticasone propionate to treat inflammatory skin conditions, allergies, or...
While some allergies are mild, they can also be a serious medical emergency. In fact, many people with serious food allergies carry an adrenaline injection. It can slow the reaction to allow time for them to receive emergency medical attention. ...
No – all the test indicates is that you are "sensitized," but it does not mean it's causing the hives and you are allergic to milk. Confirming Your Allergies An oral challenge (during which you actually consume milk) should be done in an allergist's office to see if it reproduces ...