How long does it take for a dog to get over an allergic reaction

A Quick Guide To Allergic Reactions in Dogs

Dr. Justine Leediscusses allergic reactions in dogs. For more from Dr. Lee, find her onFacebook!

Ever have an allergic reaction? The same can happen to dogs too! Allergic reactions are a very common cause for midnight visits to the emergency room for dogs.Allergic reactions are often secondary to exposure to some type of antigen (an allergen). Unfortunately, we often never know the cause for the allergic reaction, but it can be due to numerous causes such as the following:

• Drugs (like vaccines, medications, antibiotics, etc.)
• Chemicals in the environment (household cleaners like carpet cleaners, air fresheners, etc.)
• Bug bites (due to bee or wasp stings)
• Common natural allergens (like pollen, mold, etc.)
• Anything!

In dogs, signs of an allergic reaction include:

• Puffy face (e.g., swelling of the face and body)
• Hives
• Itchiness
• Redness of the skin
• Agitation/restlessness
• Feeling hot to the touch

Though rare, dogs can experience life-threatening reactions but these are less common. Signs of severe allergic reactions that warrant an immediate visit to an emergency veterinarian include:

• Collapse
• Difficulty breathing due to inflammation or swelling of the throat/airway
• Shock (e.g., an elevated heart rate, low blood pressure)
• Abnormal heart rhythm

Treatment for an allergic reaction typically includes:

• Antihistamines (like Benadryl or diphenhydramine)
• Corticosteroids (like dexamethasone or prednisone)
• And rarely, epinephrine (for severe life-threatening reactions)

In severe cases, epinephrine, oxygen, corticosteroids, blood pressure and heart monitoring, and 24/7 care are imperative for best outcome and survival.

With mild allergic reactions, you can consult your veterinarian about just treating with Benadryl at home (make sure the Benadryl doesnt have any added other ingredients). The dose of Benadryl is typically 1 mg per pound of weight of your dog (so a 50 pound dog would get 50 mgs of Benadryl).When in doubt, know what warning signs to look for when it comes to an allergic reaction to keep your pet safe.

If you have any questions or concerns, you should always visit or call your veterinarian they are your best resource to ensure the health and well-being of your pets.

Dog Hives

What Are Dog Hives?

Hives (also referred to as urticaria) are areas of the skin that appear reddened and raised. Just as with humans, hives can be very itchy for your dog. Theyre a sign that an allergy is causing the immune system to overreact.

Hives can appear very quicklyand disappear just as quickly. The raised red area of the skin is referred to as a wheal, and it can appear anywhere from a few minutes to hours after exposure to an allergen. Wheals can appear anywhere on your dogs body, but theyre usually found on the head, neck, back, stomach, and legs.

In mild cases, the hives will generally disappear within 12-48 hours after contact with the allergen. However, because of the risk that the reaction can worsen to dangerous swelling of your dogs airways or a serious allergic reaction called anaphylaxis, you should seek out treatment any time you see hives on your dog. This is especially true for hives that occur on the face or around the throat, which can lead to dangerous swelling and possible blockage of the airways.

Symptoms of Dog Hives

• Red raised areas of skin called wheals, which can occur anywhere (including mucous membranes) but are most commonly seen on the head, neck, back, abdomen, and legs

• Intense itching

• Excessive drooling if the mouth is swollen

• Swelling (angioedema), which is particularly concerning when it involves the face and respiratory system and can have severe and life-threatening consequences

Causes of Dog Hives

The allergen that causes the hives may be environmental, chemical, or dietary. Any allergen your dog is sensitive can also lead to hives. Common causes include:

Insects bites, chemical contact, and medications are the most common.

How Vets Diagnose Hives

Your vet will closely examine your dog to locate the distinctive wheals associated with hives. Wheals typically have hair on them, and may appear in clusters. Beyond the physical examination, other parts of the diagnosis include:

• Any history you are able to provide; be as thorough as you can in describing allergens your dog might have come into contact with and when and where you first saw the hives

• Your dogs response to treatment

Treatment for Dog Hives

Dogs with hives usually respond quickly to treatment, which may include:

At-home treatments may include:

• Cold compresses over the hives or swollen areas to give relief from itching

• Antihistamines, but only under the supervision of your vet

Management of Dog Hives

Work with your vet to determine the cause of the hives, using both your dogs health history and history of exposure to allergens. Depending on the cause and the frequency, your vet may recommend:

• Allergy testing to confirm environmental allergens

• Immunotherapy treatment to desensitize your dog to specific allergens

• A food trial to find ingredients that cause a reaction and develop specific dietary recommendations

Dog Hives FAQs

Are dog hives an emergency?

Yes. Hives indicate an allergic reaction within the body. Although the hives themselves are mostly just uncomfortable, they could lead to very dangerous complications, including anaphylaxis and death. Its best to treat even mild cases of hives.

What can I give my dog for hives?

It is important to speak to your veterinarian before giving your dog any medication. The vet may recommend certain medications to give your dog now or to have ready for future episodes.

How long do hives last?

Hives can disappear within a few hours or last up to 48 hours.

Can anxiety cause hives in dogs?

Theres a small chance that psychological stress can cause dog hives, but generally, anxiety merely worsens hives that are already present.

Should I take my dog to the vet for hives?

Yes, hives indicate a larger issuean allergic reactionand require treatment to make your dog comfortable and keep the reaction from progressing.

What do hives look like on a dog?

Hives are red, often swollen areas of skin that may be very itchy. They can be anywhere on the body, but youll often spot them on your dogs head, neck, back, stomach, or legs.

What foods cause hives in dogs?

There is no one food that generally causes hives in dogs. However, if your dog is allergic to a particular food or ingredient, that can cause hives for your individual dog.

Allergic reactions in dogs

Types of reaction

Bee stings

Most dogs stung by a bee, or another insect, develop redness, pain, and swelling around the site, but recover well (on their own, or with the help of an antihistamine medication). However, just like us, some dogs are allergic to insect stings and suffer much more serious symptoms. Call your vet for advice if an insect has stung your dog.

Medication and vaccine reactions

Although its extremely rare, just like us, some dogs are allergic to certain medicines and vaccinations. Fortunately, most medication and vaccinationreactions are mild, for example developing itchy skin after a flea treatment, or feeling slightly off-colour after a vaccination. However, severe reactions do sometimes happen and cause serious symptoms that require immediate veterinary attention.

Fleas, food, pollen and other allergic skin disease

Allergic skin disease (often caused by fleas, food and/or pollen) is a different type of allergy that causes a low-level, ongoing problem, (not a sudden, acute reaction). Follow the link for more information.

Dog Allergies: What You Need to Know

Allergies are quite common in dogs of all breeds and backgrounds. They occur when a dogs immune system has a hyper-reaction to a foreign substance, such as pollen, flea saliva, vaccines, spider bites, bee stings, or even certain foods that normally would cause little or no reaction in most dogs.

We suspect certain dog allergies, such as atopy or allergies to pollens and plants, are primarily hereditary in basis. Most of these dogs begin to show allergic signs between 1-3 years of age, often after they have previously been exposed to the underlying cause. While most allergies cant be cured, the goal is to manage them with treatments that can help relieve or control a dogs allergic symptoms.

Signs That Your Pet Might Have Dog Allergies

The signs of allergies vary depending on the type of allergic reaction a dog is experiencing and can vary from dog to dog. Most allergic signs in are dermatologic, which can range from itching and inflammation of the skin, feet and ears, to hives and possibly swelling of the face. Some allergic dogs can have clear watery eyes and nose, as well as sneezing.

Gastrointestinal signs can also occur such as vomiting and/or diarrhea with or without blood. In rarer cases, a much more severe and different allergic reaction called an anaphylactic reaction can occur. This is an immediate type of hypersensitivity and leads to a potentially life-threatening situation where a dog can acutely collapse due to shock and a severe drop in blood pressure.

Types Of Allergies Your Dog Might Have

There are several common types of allergies in dogs, including:

• Fleas: Reaction to the protein in flea saliva, not the actual fleas. Therefore, a dog with only one flea can still have an extensive systemic allergic reaction due to their bodys reaction to just that one fleas saliva.
• Canine Atopic Dermatitis: Also known as atopy or atopic dermatitis (AD), this is a very common canine allergy. This is usually an inherited predisposition to develop allergic symptoms after exposure to relatively common substances or allergens in the air such as pollens, grasses, weeds, molds, or fungi. Common signs of atopy are itching and inflammation in a dog often seen in the underarms, groin, face and feet. Atopy is often seasonal.
• Food Allergies: Allergies to food can manifest with a chronic skin condition such as flaky, itching skin, chronic licking or biting of the paws, or chronic ear infections (often with secondary opportunistic bacterial or yeast infections). Dogs can develop allergies to a food or substance over a period of time, even if they may have had no previous issues with that food substance or protein.
• Contact Allergies: Contact allergies are found when a dog has direct contact with a caustic surface or chemical, causing severe irritation to the skin. Household cleaners, carpet cleaners, fertilizers, topical medication, and essential oils may all potentially cause a contact allergy.
• Bacterial Hypersensitivity: Bacterial hypersensitivity occurs when a dogs immune system overreacts to the normal bacterial flora on their skin. This often occurs when other health conditions are present, such as hypothyroidism, inhalant allergy, and/or flea allergy.

Diagnosis And Treatment of Your Dogs Allergies

The best method of controlling allergies is to know what the allergen is and to avoid it or control it. Your veterinarian can perform an extensive examination with history to try to help determine the most likely cause and formulate a practical treatment plan. The gold standard for diagnosing allergies in dogs is immunotherapy or allergy testing to determine the actual cause of the allergic response and to tailor an allergen-specific immunotherapy (ASIT).

There are several options for treating your dogs allergies, including:

• Flea Prevention: Flea prevention is obvious, relatively easy, and will help dogs who suffer from allergies to fleas. Flea eradication through an extensive anti-parasitic protocol may be necessary to improve the allergy sufferer.
• Antihistamines: This treatment is generally inexpensive and safe with few side effects, but different types can have variable effects and dont work on all dogs.
• Medications: Cortisone products have been commonly used in the past with good effects on allergy sufferers, but these types of medications are not without side effects, so they need to be used judiciously and only for shorter periods of time. Newer medications such as cyclosporines (Atopica), Apoquel (an immunomodulatory), and Cytopoint (an immunotherapeutic) are currently being used extensively by clinicians with good results to minimalize the severe itching response the dog gets from allergies.
• Dietary Changes/Hypoallergenic Diets: Dairy, beef, and wheat can be responsible for up to 80% of food allergies in dogs. Hypoallergenic diets utilize one novel protein (or only one new protein in a diet) as the protein source. Most pets with food allergies respond well when switched to a store-bought hypoallergenic diet, but occasionally an animal suffers from such extreme allergies that a homemade diet is the only option. In this case, the diet should be customized with the aid of a veterinarian, veterinary dermatologist, or veterinary nutritionist.
• Environmental and External Aids: Air purifiers can help reduce certain molds. Dust and pollens are best controlled by using an air cleaner with a high-efficiency particulate air (HEPA) filter. Air conditioning can also reduce circulating amounts of airborne allergens because windows are then kept closed.
• Medicated Baths and Supplements: Many medicated dog shampoos have compounds in them that are aimed at soothing the injured skin and skin barrier and calming inflammation. In addition, frequent bathing (weekly to every other week) can remove allergens from the coat, which may contribute to skin allergy flare-ups. These shampoos are often prescribed by your veterinarian, and directions for use should always be read completely and followed explicitly.
• Supplements: Omega-3 and Omega-6 essential fatty acid supplements can be considered by your veterinarian. These fatty acids are naturally anti-inflammatory and anti-oxidative agents.
• Antibiotics and Antifungal Medications: Antibiotics are frequently needed to treat secondary skin infections. Anti-fungal medications are frequently needed to treat secondary yeast infections.

Each possible allergy treatment has its advantages and drawbacks. Finding the source of your dogs allergy and discussing a specific treatment plan with your veterinarian is recommended.