Allergies
Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment. Your immune system produces substances known as antibodies. Allergies are your immune system making antibodies that identify a particular allergen as harmful, even though it isn’t to most of the population. When you come into contact with the allergen, your immune system’s reaction causes inflammation.
Current Clinical Trials Related to Allergies
Eczema
Symptoms of this allergic skin condition include itching, reddening, and flaking or peeling of the skin. This rash is usually seen in young infants but can occur later in individuals with personal or family histories of atopy, meaning asthma or allergic rhinitis. No matter which part of the skin is affected, eczema is almost always itchy. Sometimes the itching will start before the rash appears, but when it does, the rash most commonly appears on the face, back of the knees, wrists, hands, or feet. It may also affect other areas as well. Affected areas usually appear very dry, thickened, or scaly. In fair-skinned people, these areas may initially appear reddish and then turn brown.
Asthma
Asthma is a chronic lung disease characterized by coughing, chest tightness, shortness of breath and wheezing. Asthma symptoms may be triggered by allergens or other, non-allergic stimuli, such as respiratory tract infections, cold air, or tobacco smoke. If you have asthma your airways are always inflamed. They become even more swollen and the muscles around the airways can tighten when something triggers your symptoms. This makes it difficult for air to move in and out of the lungs, causing symptoms such as coughing, wheezing, shortness of breath and/or chest tightness.
Other Types of Diseases Related to Allergies
Food Allergies
More than 50 million Americans have an allergy of some kind. Food allergies are estimated to affect 4 to 6 percent of children and 4 percent of adults, according to the Centers for Disease Control and Prevention. Food allergies involve two features of the human immune response. One is the production of immunoglobulin E (IgE), a type of protein called an antibody that circulates through the blood. The other is the mast cell, a specific cell that occurs in all body tissues but is especially common in areas of the body that are typical sites of allergic reactions, including the nose and throat, lungs, skin, and gastrointestinal tract.
Nasal Polyps
Nasal polyps (NP) are noncancerous growths within the nose or sinuses. Symptoms include trouble breathing through the nose, loss of smell, decreased taste, post nasal drip, and a runny nose. The growths are sac-like, movable, and face pain may occasionally occur. They typically occur in both nostrils in those who are affected. Complications may include sinusitis and broadening of the nose.
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