All About Allergies

FDA Homepage Abbas, Consultant Allergy and Immunology speaks about Allergies

Information about allergies

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An allergic reaction of the 75 mg xr 150 mg bupropion. The whites of the eyes conjunctivae become red and itchy, and an excessive amount of information about allergies are produced.

An allergic reaction of the skin. The skin becomes red, itchy, weepy accutane pores bumpy wherever it has come into contact with a substance that the immune system recognizes as foreign, such as poison ivy. The rash usually starts out in streaks or patches, corresponding to where the foreign substance has touched the skin.

It may spread out beyond those locations with time, information about allergies. Typically the same bumps of this rash will last days or weeks. An allergic reaction of the nose, having some similarity to a cold. Symptoms include nasal congestion, a clear runny nose, sneezing and itching. Post-nasal dripping of clear mucus frequently causes a cough. Loss of smell is common and loss of taste occurs occasionally. Nose bleeding may occur if the condition is severe. Allergic conjunctivitis eye itching, redness, and tearing frequently accompanies the nasal symptoms.

A physician who specializes in treating allergies. The highest level of training and certification is administered by the American Board of Allergy and Immunology. Those trainings take at least three years. The doctor then trains for an additional two years in an approved Allergy and Immunology fellowship.

This is followed by a rigorous examination. An allergy is the ability to have a harmful immune reaction to a foreign substance, information about allergies. Several points are worth noting:. A substance that can cause an allergic reaction in some people. Examples would include pollen, dust, mold and dander. A severe allergic reaction involving the entire body.

This may include hives, wheezing, a drop in blood pressure and sometimes death. Immediate treatment is required. A specialized protein, produced by the immune system in response to a substance, information about allergies, labeled the allergen, which looks foreign or undesirable to the body.

A medication which blocks the effects of histamine. When you have an allergic reaction, information about allergies, you most typically release histamine and other chemicals, which cause information about allergies, swelling and other problems. A common disorder of the lungs involving irritation inflammation of the tubes which carry air in and out of the lungs, known as airways or bronchi and broncioles. This irritation results in swelling of the walls of the airways and excess mucus production.

Also, muscle fibers in the walls of the airways become irritated and contract. The swelling and muscle contraction causes narrowing of the airways. This makes it harder to breathe and causes air to whistle through the lungs, known as wheezing, information about allergies. The excess mucus production leads to coughing. Much but not all asthma is allergic in origin. A person who has allergies is atopic. A skin disease characterized by itching, redness, bumpiness, and scaling, information about allergies.

Another name for this disorder is eczema. Attacks of atopic dermatitis can last for weeks, months, or be more or less continuous for years. Atopic dermatitis appears in different patterns, including generalized, whole-body rash in the very young and flexural, which occurs in the folds of the elbows and knees in older children and adults.

The cause of atopic dermatitis is not known, although it appears to have some link to allergy. Often allergic factors can be identified which trigger a worsening of atopic dermatitis. Mountain cedar is the main cause of winter allergies in Austin, although increased house dust exposure from cleaning and decorating for the holidays can also be a factor.

This includes cedar fever, hay fever ragweed in the United Statesrose fever grassand others. If you truly have a fever, information about allergies, you probably have an infection on top information about allergies your allergies! A surprisingly confusing term. A rash caused by contact between skin and some substance. Possible causes include allergic contact dermatitis see above and irritant contact dermatitis.

Tiny scales shed from skin or hair. Animal dander can cause allergic reactions in susceptible people. For example, cat dander consists of the mixture of oils and protein which coat the hairs as they grow out of the skin, along with dried saliva from licking and bits of dried urine. The cat proteins are the ingredients information about allergies which a person may be allergic.

Animal dander is very light, and can float in the air for a long time. It is a major component of household dust. This term has two related definitions. The first is the recognition of a disease by its symptoms and outward signs. The second is the analysis of the underlying cause of a disease. Obviously, information about allergies things can be floating in the air as tiny particles dustand some of them can cause allergic reactions.

When an allergist talks about dust allergy, he is most often talking about allergy to indoor information about allergies dust, specifically to house dust mites see below. Other things, including animal dander, mold, and pollen from outdoors can be found in indoor dust. Outdoor dust, such as you would experience on a windy day or cutting the lawn, consists of pollen and mold, from an allergy point of view.

It also contains sand, information about allergies, pieces of plants and other things which may be irritating to respiratory tract, but which do not cause an allergic reaction.

An unpleasant or unhealthy reaction to a food is a common information about allergies. Not all reactions to food, however, are allergic. For a reaction to qualify as a food allergy, it must involve overreaction by the immune system. For example, in a true allergy to milk, the body reacts violently to milk protein.

Symptoms may include vomiting, hives and wheezing. Other common causes of food allergies include eggs, wheat, peanut, soybean, tree nuts, fish and shellfish. It is estimated that six to eight percent of children under the age of three and nearly four percent of adults have food allergies, and the incidence is rising.

Nonallergic reactions to food are also common. Lactose intolerance, caused by the inability to digest the sugar in milk, is a well-known example. In lactose intolerance, the sugar in milk makes it all the way to the colon, where bacteria consume it, produce carbon dioxide gas as a byproduct, information about allergies, and cause abdominal cramping and diarrhea.

Another common nonallergic adverse food reaction is food poisoning, information about allergies, where food contaminated with harmful bacteria is eaten. Toxic reactions, such as consuming too much caffeine, are another type of a nonallergic adverse food reaction. Sometimes it is not immediately obvious what food, if any, you are reacting to, and whether that food reaction is truly an allergy.

This is a situation where urban legend johns hopkins about cancer thorough questioning and tests of an allergist can help. A fungus is a type of organism that lives by consuming other organisms. They are as essential to the continuation of life as plants and animals.

Most fungi are microscopic, although some, such as mushrooms, are easily visible. Different fungi have different favorite growing conditions. Changes in available food source, temperature and humidity all influence which fungi are found in the atmosphere at a information about allergies time of year. Some thrive on hay or tomatoes. Others prefer the sheltered environment inside our information about allergies. Some, such as the yeasts which produce bread, beer and wine, are an integral part of our everyday life.

Fungi are a common cause of allergic reactions. The wind can easily pick up individual fungi and information about allergies spores and carry them for miles, until they are inhaled by a sensitive individual, information about allergies. The protein found in wheat and some other grains. Gluten may cause an immediate allergic reaction in sensitive persons, with nausea, vomiting, hives and signs of anaphylaxis.

More often, gluten causes a somewhat slower but still significant reaction called celiac disease. In celiac disease, an adverse reaction by a different branch of the immune system strips off the lining of the intestines, leading to diarrhea, abdominal cramping, and a variety of other symptoms. Allergic rhinitis due to pollen.

Hay fever was originally named as the nose and eye problems occurring during hay harvesting time in the early summer. We now know that grass pollen goes through the air at that time.

Today we have expanded the use of the term hay fever to mean allergic rhinitis caused by pollen at any time of year. A chemical that plays a major role in information about allergies allergic reactions. Histamine causes blood vessels to relax, expand and leak fluid. Raised, itchy areas of skin. The swelling will usually come and go in a matter of a few hours.

Some severe hives can be present for several days, often with bruising.


Information about allergies