What is the most common physical sign of food allergy in the dog

Common symptoms of an allergic reaction include:

  1. itchy, red, watering eyes (conjunctivitis)
  2. tummy pain, feeling ill, vomiting or diarrhoea
  3. a raised, itchy, red rash (hives)
  4. wheezing, chest tightness, shortness of breath and a cough
  5. swollen lips, tongue, eyes or face
  6. sneezing and an itchy, runny or blocked nose (allergic rhinitis)
  7. dry, red and cracked skin

The symptoms vary depending on what you’re allergic to and how you come into contact with it.

For example, you may have a runny nose if exposed to pollen, develop a rash if you own a skin allergy, or feel sick if you eat something you’re allergic to.

See your GP if you or your kid might own had an allergic reaction to something.

They can assist determine whether the symptoms are caused by an allergy or another condition.

Read more about diagnosing allergies.


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Main article: Food allergy

Name Potential reaction(s) Remarks
Balsam of Peru Redness, swelling, itching, allergiccontact dermatitis reactions, stomatitis (inflammation and soreness of the mouth or tongue), cheilitis (inflammation, rash, or painful erosion of the lips, oropharyngealmucosa, or angles of their mouth), pruritus, hand eczema, generalized or resistant plantardermatitis, rhinitis, conjunctivitis, and blisters.

Present in numerous foods, such as coffee, flavored tea, wine, beer, gin, liqueurs, apéritifs (e.g. vermouth, bitters), soft drinks including cola, juice, citrus, citrus fruit peel, marmalade, tomatoes and tomato-containing products, Mexican and Italian foods with red sauces, ketchup, spices (e.g. cloves, Jamaica pepper (allspice), cinnamon, nutmeg, paprika, curry, anise, and ginger), chili sauce, barbecue sauce, chutney, pickles, pickled vegetables, chocolate, vanilla, baked goods and pastries, pudding, ice cream, chewing gum, and candy.
Egg Anaphylaxis, swelling, sometimes flatulence and vomiting An allergic individual may not own any reaction to consuming food only prepared with yolk and not glair, or vice versa.

Fish Respiratory reactions, Anaphylaxis, oral allergy syndrome, sometimes vomiting One of three allergies to seafood, not to be conflated with allergies to crustaceans and mollusks.[1] Fish allergy sufferers own a 50% likelihood of being cross reactive with another fish species,[2] but some individuals are only allergic to one species, such as; tilapia,[3] salmon, [1] or cod. A proper diagnosis is considered complicated due to these cross reactivity between fish species and other seafood allergies.

[4] Hazard extends to exposure to cooking vapors or handling.

Fruit Mild itching, rash, generalized urticaria, oral allergy syndrome, abdominal pain, vomiting, anaphylaxis Mango, strawberries, banana, [5]avocado, and kiwi are common problems.[6] Severe allergies to tomatoes own also been reported. [7][8]
Garlic Dermatitis, asymmetrical pattern of fissure, thickening/shedding of the outer skin layers,[9]anaphylaxis
Hot peppers Skin rash, hives, throat tightness, tongue swelling, possible vomiting
Oats Dermatitis, respiratory problems, anaphylaxis
Maize Hives, pallor, confusion, dizziness, stomach pain, swelling, vomiting, indigestion, diarrhea, cough, tightness in throat, wheezing, shortness of breath, anaphylaxis Often a hard allergy to manage due to the various food products which contain various forms of corn.

Milk[10] Skin rash, hives, vomiting, diarrhea, constipation, stomach pain, flatulence, nasal congestion, dermatitis, blisters, anaphylaxis Not to be confused with lactose intolerance.[11]
Peanut[12] Anaphylaxis and swelling, sometimes vomiting Includes some cold-pressed peanut oils. Distinct from tree nut allergy, as peanuts are legumes.
Poultry Meat[13] Hives, swelling of, or under the dermis, nausea, vomiting, diarrhea, severe oral allergy syndrome, shortness of breath, rarely anaphylactic shock Very rare allergies to chicken, turkey, squab, and sometimes more mildly to other avian meats.

Not to be confused with secondary reactions of bird-egg syndrome. The genuine allergy has no causal relationship with egg allergy, nor is there any shut association with red meat allergy. Prevalence still unknown as of 2016.[14]

Red Meat[15] Hives, swelling,[16] dermatitis, stomach pain, nausea, vomiting, dizziness, fainting, shortness of breath,[17], rarely anaphylaxis Allergies to the sugar carbohydrate found in beef, venison, lamb, and pork called alpha-gal.

It is brought on by tick bites.[18][19] Allergic reaction to pork is an exception, as it may also be caused by pork-cat syndrome instead of alpha-gal allergy.

Rice Sneezing, runny nose, itching, stomachache, eczema. People with a rice allergy can be affected by eating rice or breathing in rice steam.
Sesame Possible respiratory, skin, and gastrointestinal reactions which can trigger serious systemic anaphylactic responses.[20][21] By law, foods containing sesame must be labeled so in European Union, Canada, Australia, and New Zealand.[20]
Shellfish Respiratory symptoms, Anaphylaxis, oral allergy syndrome, gastrointestinal symptoms, rhinitis, conjunctivitis Shellfish allergies are highly cross reactive, but its prevalence is generally higher than that of fish allergy.

As of 2018 six allergens own been identified to prawn alone; along with crab it‘s the major culprit of seafood anaphylaxis.[1] In reference to it as one of the “Big 8” [22] or “major 14” allergens it is sometimes specified as a “crustacean shellfish” allergy, or more simply, a “crustacean allergy”.[23][24] Sometimes it is conflated with an allergy to molluscan shellfish but finish tolerance to one but not the other isn’t unusual.

Most generally, a mono-sensitive individual will experience a crustacean allergy alone with tolerance to mollusks, rather than vice versa.[1]

Soy Anaphylaxis, sometimes vomiting
Sulfites Hives, rash, redness of skin, headache (particular frontal), burning behind eyes, breathing difficulties (anaphylaxis) Used as a preserving agent in numerous diverse foods, such as raisins, dried peaches, various other dried fruit, canned or frozen fruits and vegetables, wines, vinegars and processed meats.

Tartrazine Skin irritation, hives, rash Synthetic yellow food coloring, also used for bright green coloring
Tree nut[25] Anaphylaxis, swelling, rash, hives, sometimes vomiting Hazard extends to exposure to cooking vapors, or handling. Distinct from peanut allergy, as peanuts are legumes.
Wheat[26] Eczema (atopic dermatitis), Hives, asthma, hay fever, angioedema, abdominal cramps, Celiac disease, diarrhea, temporary (3 or 4 day) mental incompetence, anemia, nausea, and vomiting[27] Not to be confused with Celiac Disease or NCGS (Non Celiac Gluten Sensitivity).

While wheat allergies are «true» allergies, Celiac Disease is an autoimmune disease.[28]


Main article: Allergy § Other environmental factors

Name Possible reaction(s) Remarks
Balsam of Peru Redness, swelling, itching, allergiccontact dermatitis reactions, stomatitis (inflammation and soreness of the mouth or tongue), cheilitis (inflammation, rash, or painful erosion of the lips, oropharyngealmucosa, or angles of their mouth), pruritus, hand eczema, generalized or resistant plantardermatitis, rhinitis, conjunctivitis, and blisters.

A number of national and international surveys own identified Balsam of Peru as being in the «top five» allergens most commonly causing patch test reactions in people referred to dermatology clinics.[41][42]
Pollen Sneezing, body ache, headache (in rare cases, extremely painful cluster headaches may happen due to allergic sinusitis; these may leave a temporary time period of 1 and a half to 2 days with eye sensitivity), allergic conjunctivitis (includes watery, red, swelled, itchy, and irritating eyes), runny nose, irritation of the nose, nasal congestion, minor fatigue, chest pain and discomfort, coughing, sore throat, facial discomfort (feeling of stuffed face) due to allergic sinusitis, possible asthma attack, wheezing
Cat Sneezing, itchy swollen eyes, rash, congestion, wheezing
Dog Rash, sneezing, congestion, wheezing, vomiting from coughing, Sometimes itchy welts.

Caused by dander, saliva or urine of dogs, or by dust, pollen or other allergens that own been carried on the fur.[43] Allergy to dogs is present in as much as 10 percent of the population.[43]
Insect sting Hives, wheezing, possible anaphylaxis Possible from bee or wasp stings, or bites from mosquitoes or flies love Leptoconops torrens.
Mold Sneeze, coughing, itchy, discharge from the nose, respiratory irritation, congested feeling,[44] joint aches, headaches, fatigue[45]
Perfume Itchy eyes, runny nose, sore throat, headaches, muscle/joint pain, asthma attack, wheezing, chest pain, blisters
Cosmetics Contact dermatitis,[46] irritant contact dermatitis, inflammation, redness,[47] conjunctivitis[48] ,sneezing
Semen Burning, pain and swelling, possibly for days, swelling or blisters, vaginal redness,[49] fever, runny nose, extreme fatigue[50][51][52][53][54] In a case study in Switzerland, a lady who was allergic to Balsam of Peru was allergic to her boyfriend’s semen following intercourse, after he drank large amounts of Coca-Cola.[55]
Latex Contact dermatitis, hypersensitivity
Water (see note) Epidermal itching Strictly aquagenic pruritus or aquagenic urticaria, but freezing urticaria may also be described as a «water allergy,» in which water may cause hives and anaphylaxis
House dust mite[56] Asthma Home allergen reduction may be recommended
Nickel (nickel sulfate hexahydrate) Allergic contact dermatitis, dyshidrotic eczema[57][58]
Gold (gold sodium thiosulfate) Allergic contact dermatitis
Chromium Allergic contact dermatitis
Cobalt chloride Allergic contact dermatitis
Formaldehyde Allergic contact dermatitis
Photographic developers Allergic contact dermatitis
Fungicide Allergic contact dermatitis, fever, anaphylaxis


Main article: Drug allergy

Name Possible reaction(s) Remarks
Balsam of Peru Redness, swelling, itching, allergiccontact dermatitis reactions, stomatitis (inflammation and soreness of the mouth or tongue), cheilitis (inflammation, rash, or painful erosion of the lips, oropharyngealmucosa, or angles of their mouth), pruritus, hand eczema, generalized or resistant plantardermatitis, rhinitis, conjunctivitis, and blisters.

Present in numerous drugs, such as hemorrhoid suppositories and ointment (e.g. Anusol), cough medicine/suppressant and lozenges, diaper rash ointments, oral and lip ointments, tincture of benzoin, wound spray (it has been reported to inhibit Mycobacterium tuberculosis as well as the common ulcer-causing bacteria H. pylori in test-tube studies), calamine lotion, surgical dressings, dental cement, eugenol used by dentists, some periodontal impression materials, and in the treatment of dry socket in dentistry.
Tetracycline Many, including: severe headache, dizziness, blurred vision, fever, chills, body aches, flu symptoms, severe blistering, peeling, dark colored urine[29][30][31]
Dilantin Many, including: swollen glands, simple bruising or bleeding, fever, sore throat[32][33][34]
Tegretol (carbamazepine) Shortness of breath, wheezing or difficulty breathing, swelling of the face, lips, tongue etc., hives[35][36][37]
Penicillin Diarrhea, hypersensitivity, nausea, rash, neurotoxicity, urticaria
Cephalosporins Maculopapular or morbilliform skin eruption, and less commonly urticaria, eosinophilia, serum-sickness–like reactions, and anaphylaxis.[38]
Sulfonamides Urinary tract disorders, haemopoietic disorders, porphyria and hypersensitivity reactions, Stevens–Johnson syndrometoxic epidermal necrolysis
Non-steroidal anti-inflammatories (cromolyn sodium, nedocromil sodium, etc.) Many, including: swollen eyes, lips, or tongue, difficulty swallowing, shortness of breath, rapid heart rate[39]
Intravenous contrast dye Anaphylactoid reactions and contrast-induced nephropathy
Local anesthetics Urticaria and rash, dyspnea, wheezing, flushing, cyanosis, tachycardia[40]


Many substances can cause an allergic reaction when in contact with the human integumentary system.

Severe allergic reaction (anaphylaxis)

In rare cases, an allergy can lead to a severe allergic reaction, called anaphylaxis or anaphylactic shock, which can be life threatening.

This affects the whole body and usually develops within minutes of exposure to something you’re allergic to.

Signs of anaphylaxis include any of the symptoms above, as well as:

Anaphylaxis is a medical emergency that requires immediate treatment.

Read more about anaphylaxis for information about what to do if it occurs.

Sheet final reviewed: 22 November 2018
Next review due: 22 November 2021

Urticaria and angioedema are hypersensitivity (or allergic) reactions to drugs, chemicals, something eaten, or even sunlight.

What are the symptoms of urticaria and angioedema?

In urticaria, little bumps happen within the skin. Often, the hair will stand up over these swellings. Sometimes, they itch. In angioedema, we see swelling of the face, especially the muzzle and around the eyes. Sometimes, the swelling is so severe, the animal cannot open its eyes. Angioedema often results in itching.

Angioedema and urticaria generally develop within 20 minutes of being exposed to the allergen (substance to which the animal is allergic).

In general, both urticaria and angioedema are not life-threatening and will go away by themselves. Rarely, the swelling in angioedema can affect the throat and make breathing difficult.

How are urticaria and angioedema treated?

Antihistamines are generally the best treatment for angioedema and urticaria. If severe, steroids are sometimes given. If respiration is affected, epinephrine is istered.

Can urticaria and angioedema be prevented?

In general, there is no way to predict which animals may develop urticaria or angioedema as a result of exposure to a certain substance.

If a pet has already had a reaction, such as anaphylaxis, angioedema, or hives, to a substance, the substance should be avoided. If your dog has ever had a reaction to a vaccine or medication, be certain your veterinarian knows and the information is placed in your pet’s medical record.

If your dog has ever had a reaction to a vaccine, subsequent vaccinations should be given by your veterinarian. Your veterinarian will probably ister an antihistamine prior to vaccination and own you remain in the office for 20-30 minutes after the vaccination, so you are correct there if your pet has a reaction.

In some cases, certain vaccines may be excluded from your dog’s vaccination regimen, or a diverse type of vaccine will be used.

Many vaccines contain antibiotics as preservatives. If your dog is allergic to an antibiotic, be certain to check every vaccines for the presence of that antibiotic before use.

If your pet has developed urticaria or angioedema from an insect bite, you may desire to discuss various options with your veterinarian. Your veterinarian may give you a prescription for an ‘epi-pen.’ An ‘epi-pen’ is a special syringe and needle filled with a single dose of epinephrine.

If your pet has an anaphylactic reaction or severe angioedema, inject the epinephrine using the ‘epi-pen’ and seek emergency veterinary assistance immediately. Be certain to take the ‘epi-pen’ with you on any trips or hikes.

This is a list of allergies, which includes the allergen, potential reactions, and a brief description of the cause where applicable.

Further reading

Health care providers often need to assess allergic disorders such as allergic rhinoconjunctivitis, asthma, and allergies to foods, drugs, latex, and venom, both in the hospital and in the clinic.

Unfortunately, some symptoms, such as chronic nasal symptoms, can happen in both allergic and nonallergic disorders, and this overlap can confound the diagnosis and therapy.

Studies propose that when clinicians use the history and physical examination alone in evaluating possible allergic disease, the accuracy of their diagnoses rarely exceeds 50%.1

Blood tests are now available that measure immunoglobulin E (IgE) directed against specific antigens. These in vitro tests can be significant tools in assessing a patient whose history suggests an allergic disease.2 However, neither allergy skin testing nor these blood tests are intended to be used for screening: they may be most useful as confirmatory diagnostic tests in cases in which the pretest clinical impression of allergic disease is high.

In susceptible people, IgE is produced by B cells in response to specific antigens such as foods, pollens, latex, and drugs.

This antigen-specific (or allergen-specific) IgE circulates in the serum and binds to high-affinity IgE receptors on immune effector cells such as mast cells located throughout the body.

Upon subsequent exposure to the same allergen, IgE receptors cross-link and initiate downstream signaling events that trigger mast cell degranulation and an immediate allergic response—hence the term immediate (or Gell-Coombs type I) hypersensitivity.3

Common manifestations of type I hypersensitivity reactions include signs and symptoms that can be:

  1. Cutaneous (eg, acute urticaria, angioedema)
  2. Gastrointestinal (eg, vomiting, diarrhea)
  3. Cardiovascular (eg, tachycardia, hypotension)
  4. Respiratory (eg, acute bronchospasm, rhinoconjunctivitis)
  5. Generalized (eg, anaphylactic shock).

    What is the most common physical sign of food allergy in the dog

    By definition, anaphylaxis is a life-threatening reaction that occurs on exposure to an allergen and involves acute respiratory distress, cardiovascular failure, or involvement of two or more organ systems.4

The blood tests for allergic disease are immunoassays that measure the level of IgE specific to a specific allergen. The tests can be used to assess sensitivity to various allergens, for example, to common inhalants such as dust mites and pollens and to foods, drugs, venom, and latex.

Types of immunoassays include enzyme-linked immunosorbent assays (ELISAs), fluorescent enzyme immunoassays (FEIAs), and radioallergosorbent assays (RASTs).

At present, most commercial laboratories use one of three autoanalyzer systems to measure specific IgE:

  1. ImmunoCAP (Phadia AB, Uppsala, Sweden)
  2. Immulite (Siemens AG, Berlin, Germany)
  3. HYTEC-288 (Hycor/Agilent, Garden Grove, CA).

These systems use a solid-phase polymer (cellulose or avidin) in which the antigen is embedded.

What is the most common physical sign of food allergy in the dog

The polymer also facilitates binding of IgE and, therefore, increases the sensitivity of the test.5 Specific IgE from the patient’s serum binds to the allergen embedded in the polymer, and then unbound antibodies are washed off.

Despite the term “RAST,” these systems do not use radiation. A fluorescent antibody is added that binds to the patient’s IgE, and the quantity of IgE present is calculated from the quantity of fluorescence.6 Results are reported in kilounits of antibody per liter (kU/L) or nanograms per milliliter (ng/mL).5–7

In general, the sensitivity of these tests ranges from 60% to 95% and their specificity from 30% to 95%, with a concordance among diverse immunoassays of 75% to 90%.8

Levels of IgE for a specific allergen are also divided into semiquantitative classes, from class I to class V or VI.

In general, class I and class II correlate with a low level of allergen sensitization and, often, with a low likelihood of a clinical reaction. On the other hand, classes V and VI reflect higher degrees of sensitization and generally correlate with IgE-mediated clinical reactions upon allergen exposure.

The interpretation of a positive (ie, “nonzero”) test result must be individualized on the basis of clinical presentation and risk factors.

A specialist can make an significant contribution by helping to interpret any positive test result or a negative test result that does not correlate with the patient’s history.

Allergy blood testing is convenient, since it involves only a standard blood draw.

In theory, allergy blood testing may be safer, since it does not expose the patient to any allergens. On the other hand, numerous patients experience bruising from venipuncture performed for any reason: 16% in one survey.9 In another survey,10 adverse reactions of any type occurred in 0.49% of patients undergoing venipuncture but only in 0.04% of those undergoing allergy skin testing.

Therefore, allergy blood testing may be most appropriate in situations in which a patient’s history suggests that he or she may be at risk of a systemic reaction from a traditional skin test or in cases in which skin testing is not possible (eg, extensive eczema).

Another advantage of allergy blood testing is that it is not affected by drugs such as antihistamines or tricyclic antidepressants that suppress the histamine response, which is a problem with skin testing.

Allergy blood testing may also be useful in patients on long-term glucocorticoid therapy, although the data conflict.

Prolonged oral glucocorticoid use is associated with a decrease in mast cell density and histamine content in the skin,11,12 although in one study a corticosteroid was found not to affect the results of skin-prick testing for allergy.13 Thus, allergy blood testing can be performed in patients who own severe eczema or dermatographism or who cannot safely suspend taking antihistamines or tricyclic antidepressants.