What to give 2 year old for allergies

Food contains additives for numerous reasons, such as to preserve it, to help make it safe to eat for longer, and to give colour or texture.

All food additives go through strict safety testing before they can be used. Food labelling must clearly show additives in the list of ingredients, including their name or «E» number and their function, such as «colour» or «preservative».

A few people own adverse reactions to some food additives, love sulphites, but reactions to ordinary foods, such as milk or soya, are much more common.

What to give 2 year ancient for allergies

Read more about food colours and hyperactivity.

Further information

Sheet final reviewed: 24 July 2018
Next review due: 24 July 2021

Immune system response to a substance that most people tolerate well

For the medical journal of this title, see Allergy (journal).

Allergy
Hives are a common allergic symptom
Specialty Immunology
Symptoms Red eyes, itchy rash, runny nose, shortness of breath, swelling, sneezing[1]
Types Hay fever, food allergies, atopic dermatitis, allergic asthma, anaphylaxis[2]
Causes Genetic and environmental factors[3]
Diagnostic method Based on symptoms, skin prick test, blood test[4]
Differential diagnosis Food intolerances, food poisoning[5]
Prevention Early exposure to potential allergens[6]
Treatment Avoiding known allergens, medications, allergen immunotherapy[7]
Medication Steroids, antihistamines, epinephrine, mast cell stabilizers, antileukotrienes[7][8][9][10]
Frequency Common[11]

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.[12] These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.[2] Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling.[1]Food intolerances and food poisoning are separate conditions.[4][5]

Common allergens include pollen and certain foods.[12] Metals and other substances may also cause problems.[12] Food, insect stings, and medications are common causes of severe reactions.[3] Their development is due to both genetic and environmental factors.[3] The underlying mechanism involves immunoglobulin E antibodies (IgE), part of the body’s immune system, binding to an allergen and then to a receptor on mast cells or basophils where it triggers the release of inflammatory chemicals such as histamine.[13] Diagnosis is typically based on a person’s medical history.[4] Further testing of the skin or blood may be useful in certain cases.[4] Positive tests, however, may not mean there is a significant allergy to the substance in question.[14]

Early exposure to potential allergens may be protective.[6] Treatments for allergies include avoiding known allergens and the use of medications such as steroids and antihistamines.[7] In severe reactions injectable adrenaline (epinephrine) is recommended.[8]Allergen immunotherapy, which gradually exposes people to larger and larger amounts of allergen, is useful for some types of allergies such as hay fever and reactions to insect bites.[7] Its use in food allergies is unclear.[7]

Allergies are common.[11] In the developed world, about 20% of people are affected by allergic rhinitis,[15] about 6% of people own at least one food allergy,[4][6] and about 20% own atopic dermatitis at some point in time.[16] Depending on the country about 1–18% of people own asthma.[17][18] Anaphylaxis occurs in between 0.05–2% of people.[19] Rates of numerous allergic diseases appear to be increasing.[8][20] The expression «allergy» was first used by Clemens von Pirquet in 1906.[3]



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Exclusive breastfeeding or first baby formula is recommended for around the first 6 months of life.

If your baby has a cow’s milk allergy and is not being breastfed, talk to your GP about what helpful of formula to give your baby.

Pregnant or breastfeeding women don’t need to avoid foods that can trigger allergic reactions (including peanuts), unless you’re allergic to them.

If your baby already has an allergy such as a diagnosed food allergy or eczema, or if you own a family history of food allergies, eczema, asthma or hay-fever, you may need to be particularly careful when introducing foods, so talk to your GP or health visitor first.


Cause

Risk factors for allergy can be placed in two general categories, namely host and environmental factors.[31] Host factors include heredity, sex, race, and age, with heredity being by far the most significant.

However, there own been recent increases in the incidence of allergic disorders that cannot be explained by genetic factors alone. Four major environmental candidates are alterations in exposure to infectious diseases during early childhood, environmental pollution, allergen levels, and dietary changes.[32]

Medications

Main article: Drug allergy

See also: Adverse drug reaction and Drug eruption

About 10% of people report that they are allergic to penicillin; however, 90% turn out not to be.[45] Serious allergies only happen in about 0.03%.[45]

Toxins interacting with proteins

Another non-food protein reaction, urushiol-induced contact dermatitis, originates after contact with poison ivy, eastern poison oak, western poison oak, or poison sumac.

Urushiol, which is not itself a protein, acts as a hapten and chemically reacts with, binds to, and changes the shape of integral membrane proteins on exposed skin cells.

What to give 2 year ancient for allergies

The immune system does not recognize the affected cells as normal parts of the body, causing a T-cell-mediated immune response.[46] Of these poisonous plants, sumac is the most virulent.[47] The resulting dermatological response to the reaction between urushiol and membrane proteins includes redness, swelling, papules, vesicles, blisters, and streaking.[48]

Estimates vary on the percentage of the population that will own an immune system response.

Approximately 25 percent of the population will own a strong allergic response to urushiol. In general, approximately 80 percent to 90 percent of adults will develop a rash if they are exposed to .0050 milligrams (7.7×10−5 gr) of purified urushiol, but some people are so sensitive that it takes only a molecular trace on the skin to initiate an allergic reaction.[49]

Genetics

Allergic diseases are strongly familial: identical twins are likely to own the same allergic diseases about 70% of the time; the same allergy occurs about 40% of the time in non-identical twins.[50] Allergic parents are more likely to own allergic children,[51] and those children’s allergies are likely to be more severe than those in children of non-allergic parents.

Some allergies, however, are not consistent along genealogies; parents who are allergic to peanuts may own children who are allergic to ragweed. It seems that the likelihood of developing allergies is inherited and related to an irregularity in the immune system, but the specific allergen is not.[51]

The risk of allergic sensitization and the development of allergies varies with age, with young children most at risk.[52] Several studies own shown that IgE levels are highest in childhood and drop rapidly between the ages of 10 and 30 years.[52] The peak prevalence of hay fever is highest in children and young adults and the incidence of asthma is highest in children under 10.[53]

Overall, boys own a higher risk of developing allergies than girls,[51] although for some diseases, namely asthma in young adults, females are more likely to be affected.[54] These differences between the sexes tend to decrease in adulthood.[51]

Ethnicity may frolic a role in some allergies; however, racial factors own been hard to separate from environmental influences and changes due to migration.[51] It has been suggested that diverse genetic loci are responsible for asthma, to be specific, in people of European, Hispanic, Asian, and African origins.[55]

Latex

Latex can trigger an IgE-mediated cutaneous, respiratory, and systemic reaction.

The prevalence of latex allergy in the general population is believed to be less than one percent. In a hospital study, 1 in 800 surgical patients (0.125 percent) reported latex sensitivity, although the sensitivity among healthcare workers is higher, between seven and ten percent. Researchers attribute this higher level to the exposure of healthcare workers to areas with significant airborne latex allergens, such as operating rooms, intensive-care units, and dental suites. These latex-rich environments may sensitize healthcare workers who regularly inhale allergenic proteins.[43]

The most prevalent response to latex is an allergic contact dermatitis, a delayed hypersensitive reaction appearing as dry, crusted lesions.

This reaction generally lasts 48–96 hours. Sweating or rubbing the area under the glove aggravates the lesions, possibly leading to ulcerations.[43]Anaphylactic reactions happen most often in sensitive patients who own been exposed to a surgeon’s latex gloves during abdominal surgery, but other mucosal exposures, such as dental procedures, can also produce systemic reactions.[43]

Latex and banana sensitivity may cross-react. Furthermore, those with latex allergy may also own sensitivities to avocado, kiwifruit, and chestnut.[44] These people often own perioral itching and local urticaria.

Only occasionally own these food-induced allergies induced systemic responses. Researchers suspect that the cross-reactivity of latex with banana, avocado, kiwifruit, and chestnut occurs because latex proteins are structurally homologous with some other plant proteins.[43]

Hygiene hypothesis

Main article: Hygiene hypothesis

Allergic diseases are caused by inappropriate immunological responses to harmless antigens driven by a TH2-mediated immune response. Numerous bacteria and viruses elicit a TH1-mediated immune response, which down-regulates TH2 responses.

The first proposed mechanism of action of the hygiene hypothesis was that insufficient stimulation of the TH1 arm of the immune system leads to an overactive TH2 arm, which in turn leads to allergic disease.[56] In other words, individuals living in too sterile an environment are not exposed to enough pathogens to hold the immune system busy. Since our bodies evolved to deal with a certain level of such pathogens, when they are not exposed to this level, the immune system will attack harmless antigens and thus normally benign microbial objects—like pollen—will trigger an immune response.[57]

The hygiene hypothesis was developed to explain the observation that hay fever and eczema, both allergic diseases, were less common in children from larger families, which were, it is presumed, exposed to more infectious agents through their siblings, than in children from families with only one kid.

The hygiene hypothesis has been extensively investigated by immunologists and epidemiologists and has become an significant theoretical framework for the study of allergic disorders. It is used to explain the increase in allergic diseases that own been seen since industrialization, and the higher incidence of allergic diseases in more developed countries. The hygiene hypothesis has now expanded to include exposure to symbiotic bacteria and parasites as significant modulators of immune system development, along with infectious agents.

Epidemiological data support the hygiene hypothesis. Studies own shown that various immunological and autoimmune diseases are much less common in the developing world than the industrialized world and that immigrants to the industrialized world from the developing world increasingly develop immunological disorders in relation to the length of time since arrival in the industrialized world.[58] Longitudinal studies in the third world protest an increase in immunological disorders as a country grows more affluent and, it is presumed, cleaner.[59] The use of antibiotics in the first year of life has been linked to asthma and other allergic diseases.[60] The use of antibacterial cleaning products has also been associated with higher incidence of asthma, as has birth by Caesarean section rather than vaginal birth.[61][62]

Insect stings

Main article: Insect sting allergy

Typically, insects which generate allergic responses are either stinging insects (wasps, bees, hornets and ants) or biting insects (mosquitoes, ticks).

Stinging insects inject venom into their victims, whilst biting insects normally introduce anti-coagulants.

What to give 2 year ancient for allergies

Stress

Chronic stress can aggravate allergic conditions. This has been attributed to a T helper 2 (TH2)-predominant response driven by suppression of interleukin 12 by both the autonomic nervous system and the hypothalamic–pituitary–adrenal axis. Stress management in highly susceptible individuals may improve symptoms.[63]

Foods

Main article: Food allergy

A wide variety of foods can cause allergic reactions, but 90% of allergic responses to foods are caused by cow’s milk, soy, eggs, wheat, peanuts, tree nuts, fish, and shellfish.[33] Other food allergies, affecting less than 1 person per 10,000 population, may be considered «rare».[34] The use of hydrolysed milk baby formula versus standard milk baby formula does not appear to change the risk.[35]

The most common food allergy in the US population is a sensitivity to crustacea.[34] Although peanut allergies are notorious for their severity, peanut allergies are not the most common food allergy in adults or children.

Severe or life-threatening reactions may be triggered by other allergens, and are more common when combined with asthma.[33]

Rates of allergies differ between adults and children. Peanut allergies can sometimes be outgrown by children. Egg allergies affect one to two percent of children but are outgrown by about two-thirds of children by the age of 5.[36] The sensitivity is generally to proteins in the white, rather than the yolk.[37]

Milk-protein allergies are most common in children.[38] Approximately 60% of milk-protein reactions are immunoglobulin E-mediated, with the remaining generally attributable to inflammation of the colon.[39] Some people are unable to tolerate milk from goats or sheep as well as from cows, and numerous are also unable to tolerate dairy products such as cheese.

Roughly 10% of children with a milk allergy will own a reaction to beef. Beef contains little amounts of proteins that are present in greater abundance in cow’s milk.[40]Lactose intolerance, a common reaction to milk, is not a form of allergy at every, but rather due to the absence of an enzyme in the digestive tract.

Those with tree nut allergies may be allergic to one or to numerous tree nuts, including pecans, pistachios, pine nuts, and walnuts.[37] Also seeds, including sesame seeds and poppy seeds, contain oils in which protein is present, which may elicit an allergic reaction.[37]

Allergens can be transferred from one food to another through genetic engineering; however genetic modification can also remove allergens.

Little research has been done on the natural variation of allergen concentrations in unmodified crops.[41][42]

Other environmental factors

There are differences between countries in the number of individuals within a population having allergies.

What to give 2 year ancient for allergies

Allergic diseases are more common in industrialized countries than in countries that are more traditional or agricultural, and there is a higher rate of allergic disease in urban populations versus rural populations, although these differences are becoming less defined.[64] Historically, the trees planted in urban areas were predominantly male to prevent litter from seeds and fruits, but the high ratio of male trees causes high pollen counts.[65]

Alterations in exposure to microorganisms is another plausible explanation, at present, for the increase in atopic allergy.[32] Endotoxin exposure reduces release of inflammatory cytokines such as TNF-α, IFNγ, interleukin-10, and interleukin-12 from white blood cells (leukocytes) that circulate in the blood.[66] Certain microbe-sensing proteins, known as Toll-like receptors, found on the surface of cells in the body are also thought to be involved in these processes.[67]

Gutworms and similar parasites are present in untreated drinking water in developing countries, and were present in the water of developed countries until the routine chlorination and purification of drinking water supplies.[68] Recent research has shown that some common parasites, such as intestinal worms (e.g., hookworms), secrete chemicals into the gut wall (and, hence, the bloodstream) that suppress the immune system and prevent the body from attacking the parasite.[69] This gives rise to a new slant on the hygiene hypothesis theory—that co-evolution of humans and parasites has led to an immune system that functions correctly only in the presence of the parasites.

Without them, the immune system becomes unbalanced and oversensitive.[70] In specific, research suggests that allergies may coincide with the delayed establishment of gut flora in infants.[71] However, the research to support this theory is conflicting, with some studies performed in China and Ethiopia showing an increase in allergy in people infected with intestinal worms.[64] Clinical trials own been initiated to test the effectiveness of certain worms in treating some allergies.[72] It may be that the term ‘parasite’ could turn out to be inappropriate, and in fact a hitherto unsuspected symbiosis is at work.[72] For more information on this topic, see Helminthic therapy.


Introducing foods that could trigger allergy

When you start introducing solid foods to your baby from around 6 months ancient, introduce the foods that can trigger allergic reactions one at a time and in extremely little amounts so that you can spot any reaction.

These foods are:

  1. eggs (eggs without a red lion stamp should not be eaten raw or lightly cooked)
  2. shellfish (don’t serve raw or lightly cooked)
  3. soya
  4. nuts and peanuts (serve them crushed or ground)
  5. foods that contain gluten, including wheat, barley and rye
  6. seeds (serve them crushed or ground)
  7. cows’ milk
  8. fish

See more about foods to avoid giving babies and young children.

These foods can be introduced from around 6 months as part of your baby’s diet, just love any other foods.

Once introduced and if tolerated, these foods should become part of your baby’s usual diet to minimise the risk of allergy.

Evidence has shown that delaying the introduction of peanut and hen’s eggs beyond 6 to 12 months may increase the risk of developing an allergy to these foods.

Lots of children outgrow their allergies to milk or eggs, but a peanut allergy is generally lifelong.

If your kid has a food allergy, read food labels carefully.

Avoid foods if you are not certain whether they contain the food your kid is allergic to.


How will I know if my kid has a food allergy?

An allergic reaction can consist of 1 or more of the following:

  1. a cough
  2. runny or blocked nose
  3. swollen lips and throat
  4. itchy throat and tongue
  5. wheezing and shortness of breath
  6. itchy skin or rash
  7. diarrhoea or vomiting
  8. sore, red and itchy eyes

In a few cases, foods can cause a severe allergic reaction (anaphylaxis) that can be life-threatening.

What to give 2 year ancient for allergies

Get medical advice if you ponder your kid is having an allergic reaction to a specific food.

Don’t be tempted to experiment by cutting out a major food, such as milk, because this could lead to your kid not getting the nutrients they need. Talk to your health visitor or GP, who may refer you to a registered dietitian.


Signs and symptoms

Affected organ Common signs and symptoms
Nose Swelling of the nasal mucosa (allergic rhinitis) runny nose, sneezing
Sinuses Allergic sinusitis
Eyes Redness and itching of the conjunctiva (allergic conjunctivitis, watery)
Airways Sneezing, coughing, bronchoconstriction, wheezing and dyspnea, sometimes outright attacks of asthma, in severe cases the airway constricts due to swelling known as laryngeal edema
Ears Feeling of fullness, possibly pain, and impaired hearing due to the lack of eustachian tube drainage.

Skin Rashes, such as eczema and hives (urticaria)
Gastrointestinal tract Abdominal pain, bloating, vomiting, diarrhea

Many allergens such as dust or pollen are airborne particles. In these cases, symptoms arise in areas in contact with air, such as eyes, nose, and lungs. For instance, allergic rhinitis, also known as hay fever, causes irritation of the nose, sneezing, itching, and redness of the eyes.[21] Inhaled allergens can also lead to increased production of mucus in the lungs, shortness of breath, coughing, and wheezing.[22]

Aside from these ambient allergens, allergic reactions can result from foods, insect stings, and reactions to medications love aspirin and antibiotics such as penicillin.

Symptoms of food allergy include abdominal pain, bloating, vomiting, diarrhea, itchy skin, and swelling of the skin during hives. Food allergies rarely cause respiratory (asthmatic) reactions, or rhinitis.[23] Insect stings, food, antibiotics, and certain medicines may produce a systemic allergic response that is also called anaphylaxis; multiple organ systems can be affected, including the digestive system, the respiratory system, and the circulatory system.[24][25][26] Depending on the rate of severity, anaphylaxis can include skin reactions, bronchoconstriction, swelling, low blood pressure, coma, and death.

This type of reaction can be triggered suddenly, or the onset can be delayed. The nature of anaphylaxis is such that the reaction can seem to be subsiding, but may recur throughout a period of time.[26]

Skin

Substances that come into contact with the skin, such as latex, are also common causes of allergic reactions, known as contact dermatitis or eczema.[27] Skin allergies frequently cause rashes, or swelling and inflammation within the skin, in what is known as a «weal and flare» reaction characteristic of hives and angioedema.[28]

With insect stings a large local reaction may happen (an area of skin redness greater than 10 cm in size).[29] It can final one to two days.[29] This reaction may also happen after immunotherapy.[30]


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