Depending on the type of reaction and its severity, the duration of symptoms can vary from days to weeks. It can last for minutes, hours or even days.
While an estimated 40 to 50 million Americans have allergies, only one to two percent of all adults are allergic to foods or food additives. Eight percent of children under age six have adverse reactions to ingested foods but of that 8%, only 2-5% have confirmed food allergies. The most common symptoms of food allergy involve the skin and intestines. Skin reactions include rashes (hives and eczema), while intestinal symptoms typically include vomiting, nausea, stomach cramps, indigestion and/or diarrhea. The symptoms of food allergies range from mild discomfort to severe, life-threatening reactions (anaphylaxis), which require immediate medical treatment. The most frequent symptoms of food allergies are itching and/or swelling of the mouth. Oral itching (known as Oral Allergy Syndrome) can be an initial symptom in any kind of food allergy. However, oral itching is a well known symptom in food allergy induced by cross-reaction with pollen. It can happen with foods like apple, kiwi, hazelnuts, walnuts, celery, carrot, tomato, cherry, and melon. Allergic reactions to foods may occur within a few minutes after eating the offending food, but rarely symptoms may also develop after hours, making the relationship with ingestion of food less clear. Oral itching (known as Oral Allergy Syndrome) can be an initial symptom in any kind of food allergy. However, oral itching is a well known symptom in food allergy induced by cross-reaction with pollen. It can happen with foods like apple, kiwi, hazelnuts, walnuts, celery, carrot, tomato, cherry, and melon. Your body then releases a host of chemicals. One of them, histamine, is responsible for the symptoms that appear on your skin. Depending on the type of reaction and its severity, the duration of symptoms can vary from days to weeks. Hives are the red, itchy bumps that show up due to a food or drug allergy. They normally go away after a few days. However, some cases of chronic hives can last for months or years. Until hives go away, you can relieve symptoms using antihistamines Hives can happen once or linger and repeat. They can last minutes, hours, days, several weeks, months or even years. There are two types of hives: acute urticaria and chronic urticarial. The acute variety lasts for six weeks or less, while the chronic variety can stay or recur for more than six weeks.  Posts: 98. Re: how long does food allergy last. hi! my reactions can last for minutes, hours or even days. if it is one I am very allergic to and my intestines are affected, it can last for over a week. Also if it causes congestion that can take quite some time to subside. I'd say the average is app. 2 days However, if they are allergic to a food that is cross-reacting with pollen they may only experience symptoms in the pollen season. Different kinds of food poisoning can provoke symptoms that are similar to the symptoms experienced in food allergy. Oral itching (known as Oral Allergy Syndrome) can be an initial symptom in any kind of food allergy. However, oral itching is a well known symptom in food allergy induced by cross-reaction with pollen. It can happen with foods like apple, kiwi, hazelnuts, walnuts, celery, carrot, tomato, cherry, and melon. I don't know how long reactions will last, but I do know that when an allergen gets into your system it can take weeks for it to clear completely... for example, dairy can go up to 6 weeks or more, but usually the majority of symptoms should clear in a week or two. My allergies are many (more than top 8) but minor (eczema, intestinal, but no ana) I know when I have reactions to something it will take a week or two to clear. For some people, an allergic reaction to a particular food may be uncomfortable but not severe. For other people, an allergic food reaction can be frightening and even life-threatening. Food allergy symptoms usually develop within a few minutes to two hours after eating the offending food. The most common food allergy signs and symptoms include: 1  Tingling or itching in the mouth. Anaphylaxis. In some people, a food allergy can trigger a severe allergic reaction called anaphylaxis. This can cause life-threatening signs and symptoms, including: 1  Constriction and tightening of airways. 2  A swollen throat or the sensation of a lump in your throat that makes it difficult to breathe.
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how long can a food allergy reaction last