Doctor insights on:
What S The Difference Between A Food Allergy And Oral Allergy Syndrome
Cause of Oral allerg: Oas is seen when people with high level of ragweed pollen allergy feel itchy mouth and throat when they eat melons, (watermelon, cantaloupe, honeydew and rarely cucumbers). Also, birch pollen allergy triggers this when eating peach family fruits ( cherries, apricots, nectarines, etc...), apples and pears. Diagnosis is made by positive tests to the pollen and history. Pollen immunotherapy may help. ...Read moreSee 3 more doctor answers
Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more
Intolerance subset: Food allergy (fa) is a subset of food intolerance (fi). Fa involves an abnormal immune system reaction to an otherwise innocuous food. Mechanisms of fi include inability to digest a food as in lactose intolerance. Fa can be life-threatening; fi is not. Symptoms of fi are limited to the GI tract - pain, bloat, gas, vomiting, diarrhea. Fa symptoms may be GI as well as respiratory, skin & cardiac. ...Read moreSee 1 more doctor answer
The immune response: An allergy is caused by specific cells and/or proteins in the body that are designed to recognize specific sites in the allergen, i.e. Peanut, walnut, cat dander, etc. These include immunoglobulin e, and t and b cells. An intolerance is caused by an inability to digest a sugar or protein, but does not involve the same immunoglobulins and cells. ...Read moreSee 3 more doctor answers
Different: Food allergy refers to an ige mediated reaction to a food that could result in itchiness, hives, lip or tongue swelling, asthma and rarely death. Food intolerance is not ige mediated food allergy and could include lactose intolerance where one lacks the enzyme lactase that is needed to digests lactose -- the sugar in milk. ...Read more
Broad v specific: An allergy reaction is a very specific sort of immune response involving a specific set of cells and inflammatory mediators. An intolerance has a much broader definition and is typically not an immune system reaction. Lactose intolerance, for instance, is an enzyme deficiency that makes one unable to digest lactose. ...Read more
Overlapping symptoms: There are overlapping symptoms between the common viral cold, sinus infections and allergic rhinitis (allergies) for an easy to use chart, go to my blog and read. http://www.familyallergyasthmacare.com/2013/02/is-it-a-cold-sinus-or-allergies/ In a nutshell, itching (nose, eyes, palate) makes it more likely to be an allergy. Fever makes it most likely to be an infection. ...Read more
Need advice on what is the the difference between having a food intolerance and having a food allergy?
See below: Food allergy: usually comes on suddenly. Small amount of food can trigger. Happens every time you eat the food. Can be life-threatening food intolerance: usually comes on gradually. May only happen when you eat a lot of the food. May only happen if you eat the food often. Is not life-threatening. ...Read more
Wording issues: You will be intolerant to gluten if you are allergic to it.Your body will have reactions to it and many could be severe. Allergy skin tests and blood tests would be positive. You could be intolerant to gluten but not have typical allergic reactions (hives, difficulty breathing, positive skin and blood tests), but you might have indigestion, constant bloating, intermittent diarrhea, etc. ...Read more
One causes the other: The two walk together. Asthma commonly is caused by allergies affecting the lower airways - the bronchial tubes tighten, become swollen and become congested with excess mucus. Asthma can also be triggered by other things, such as exercise, smoke, viruses etc., but by controlling allergies, asthma and asthmatic reactions are much less likely to occur. ...Read moreSee 3 more doctor answers
Immune response: A true food allergy involves a specific immune response by your body, usually with allergic antibody directed at the implicated food, though other mechanisms can occur. Food intolerance simply implies that a patient does not tolerate a food, with the most common exampl being lactose intolerance, wherein the body does not make enough lactase to digest lactose. ...Read moreSee 1 more doctor answer
Immunology: An allergic reaction is caused by your immune system reaction to the food. Skin tests and blood test can be helpful with the diagnosis. An intolerance is an adverse reaction not through an immunologic mechanism. An example is lactose intolerance where you loose the ability to break down sugars in milk. Allergy testing will not be helpful for an intolerance. ...Read more
Sometimes difficult: but except in very severe cases of allergy, people don't lose appetite with allergy which is also not associated with a fever. Allergy may also be seasonal. Cold is more common when school starts and in the winter, allergy in the warmer months. Cold is not relieved by antihistamine which does reduce allergic symptoms. Hope these points are helpful. ...Read more
Keeps coming back: They are similar! Itchy nose, sneezing, nasal congeston, running nose, coughing, sinus pain/fullness, post nasal drip. No fever with allergies, though. And most with allergies don't 'feel sick'; but they do feel tired, fatigued, wiped out. Why? Because allergies, like colds, tigger immune responses that sap energy. ...Read more
Allergy: A food allergy is based on an allergic immune response where your body creates an antibody against that food and causes you to have hives, swelling, severe cramps and some case anaphylaxis. A food sensitivity varies in its symptoms and is not based on a specific immune response. ...Read more
Sxs/mechanism: A true food allergy goes through the immune system and causes a sudden, potentially life threatening reaction (anaphylaxis) which includes hives, swelling, breathing sxs, GI sxs, heart sxs, nasal/eye sxs. This can be diagnosed by an allergist. Celiac is a different immune response to gluten in the gut. Symptoms can be more subtle (stomach sxs and others) and initial eval involves a blood test. ...Read more
Physical reactions to certain foods are common, but most are caused by a food intolerance rather than a food allergy: A food intolerance can cause some of the same signs and symptoms as a food allergy, so people often confuse the two. A true food allergy causes an immune system reaction that affects numerous organs in the body. It can cause a range of symptoms. In some cases, an allergic reaction to a food can be severe or life-threatening. In contrast, food intolerance symptoms are generally less serious and often limited to digestive problems. If you have a food intolerance, you may be able to eat small amounts of the offending food without trouble. You may also be able to prevent a reaction. For example, if you have lactose intolerance, you may be able to drink lactose-free milk or take lactase enzyme pills (Lactaid) to aid digestion. Causes of food intolerance include: Absence of an enzyme needed to fully digest a food. , Irritable bowel syndrome. , Food poisoning. , Sensitivity to food additives. , Recurring stress or psychological factors. , Celiac disease. . If you have a reaction after eating a particular food, see your doctor to determine whether you have a food intolerance or a food allergy. If you have a food allergy, you may be at risk of a life-threatening allergic reaction (anaphylaxis) — even if past reactions have been mild. Learn how to recognize a severe allergic reaction and know what to do if one occurs. You may need to carry an emergency epinephrine shot (EpiPen, Auvi-Q, others) for emergency self-treatment. If you have a food intolerance, your doctor may recommend steps to aid digestion of certain foods or to treat the underlying condition causing your reaction. ...Read more
Many: An allergic reaction is due to an immunoglobulin called ige and involves histamine and other mediators or chemicals produced in the body. Acne is a an inflammatory process involving the sebaceous follicles and androgen, a hormone. Acne can also manifest in noninflammatory forms but does not involve the chemicals of an allergic reaction or ige which is the lynchpin of an allergic reaction. ...Read more
A matter of degree: Celiac disease is an autoimmune condition where eating foods with gluten damage the intestinal lining causing gastrointestinal symptoms and sometimes cause skin rashes. Patients must strictly avoid all gluten. People with gluten intolerance can usually tolerate small amounts of gluten and do not have celiac disease. See a specialist for proper diagnosis. ...Read more
Hypersensitivity: Hypersensitivity refers to undesirable reactions produced by a normal immune system. There are 5 types of hypersensitivity reactions. Type i reactions are considered allergic or ige-mediated reactions and involve a rapid response, such as seen in asthma or anaphylaxis. The arthus reaction falls under the category of type iii, or immune-complex mediated reactions. This involves igg and neutrophils. ...Read more
Caused by heat: Heat rash is caused by heat. It has a variety of presentations, most common being red bumps with small vesicles that are easily ruptured. Contact dermatitis is extremely itchy and is localized to areas that are exposed to the offending agent. It is always red and swollen and sometimes has small vesicles with the affected area. ...Read more
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