Heat Rash on Dogs

Can Dogs Get Heat Rash？

Yes, dogs can get heat rash, just like humans. Heat rash, also known as prickly heat or miliaria, occurs when sweat becomes trapped in the sweat ducts, leading to irritation, redness, and sometimes small red bumps on the skin. It is more common in hot and humid weather when dogs are unable to cool themselves effectively.

What is Heat Rash on Dogs?

Heat rash, also known as prickly heat or miliaria, is a skin condition that can make your furry friend uncomfortable and irritable. Heat rash in dogs, much like in humans, is a skin disorder that occurs when sweat becomes trapped in the sweat ducts, leading to inflammation and discomfort. Unlike humans, dogs have fewer sweat glands, and they primarily dissipate heat through panting. However, when the weather is excessively hot, their sweat glands can become overworked, leading to the development of heat rash.

What Does Heat Rash Look Like on Dogs?

It typically occurs when a dog's sweat glands become blocked, leading to the trapping of sweat under the skin. This can happen when a dog is exposed to hot and humid weather, leading to symptoms such as:

• Redness: Heat rash in dogs often presents as red, irritated skin. You may notice red patches or areas of redness on your dog's skin.
• Small Bumps: Heat rash can also cause small, raised bumps or blisters on the skin. These may look like tiny pimples or pustules.
• Itching: Dogs with heat rash may exhibit signs of discomfort and itching. They may scratch or lick the affected areas to relieve the itchiness.
• Hair Loss: In severe cases or if left untreated, heat rash can lead to hair loss in the affected areas.
• Moisture and Swelling: The rash may feel moist to the touch, and the affected skin might be slightly swollen.

Where Are the Common Areas of Heat Rash in Dogs?

 Here are some common areas where heat rash can develop in dogs:

• Groin and armpits: These areas often have folds of skin where moisture can accumulate, making them susceptible to heat rash.
• Belly: The underside of a dog's belly, especially in breeds with loose or pendulous skin, can develop heat rash if it is not well-ventilated.
• Neck and chest: In some cases, heat rash can develop on the neck and chest, particularly in dogs with thick fur or dogs that wear collars that trap heat.
• Ears: Dogs with floppy or heavy ears may develop heat rash on the inside of their ears, especially if they do not dry properly after swimming or getting wet.
• Paw pads: The paw pads are another common location for heat rash, especially if the dog has been walking on hot pavement or surfaces.
• Tail base: The area around the base of the tail can also be prone to heat rash, especially in long-haired breeds.
• Wrinkled skin areas: Breeds with wrinkled skin, such as Bulldogs or Shar-Peis, may develop heat rash in the folds of their skin.

What Causes Heat Rash in Dogs?

Several factors can contribute to the development of heat rash in dogs:

Hot and Humid Weather

Heat rash is more common during hot and humid weather when dogs are exposed to high temperatures. Dogs with thick fur coats or brachycephalic breeds (short-nosed dogs like Bulldogs and Pugs) are more susceptible because they have difficulty cooling themselves through panting.

Excessive Moisture

Dogs that get wet and remain damp for extended periods are at higher risk of developing heat rash. This can happen after swimming, rain exposure, or if they are not thoroughly dried after a bath.

Poor Grooming

Dogs that are not groomed regularly or have tangled, matted fur are more likely to develop heat rash because air circulation around their skin is reduced, making it easier for sweat glands to become clogged.

Heavy Fur

Heat rash, also known as prickly heat or miliaria, can affect dogs of any breed, but some breeds may be more prone to it due to their double coats, thick coats, or obesity. Here's a breakdown of these categories:

Double-Coated Breeds:

Double-coated breeds typically have a soft, insulating undercoat and a thicker, coarser topcoat. These breeds are more prone to heat rash because their dense fur can trap heat and moisture close to the skin, leading to skin irritation. Some examples of double-coated breeds include:

• Siberian Husky
• Alaskan Malamute
• Samoyed
• Chow Chow
• Bernese Mountain Dog
• Golden Retriever (although they can have varying coat types)

Thick-Coated Breeds:

Thick-coated breeds, which may not necessarily have a double coat, can also be prone to heat rash due to their dense fur. These dogs may have long, heavy, or plush coats that make them more susceptible to overheating. Examples of thick-coated breeds include:

• Newfoundland
• Shih Tzu
• Old English Sheepdog
• Afghan Hound
• Great Pyrenees

Obesity

Obesity is a risk factor for heat-related issues in dogs, including heat rash. Overweight or obese dogs have more insulating fat layers, which can contribute to higher body temperatures. Any breed can become obese, but some breeds are more predisposed to weight gain. It's important to note that obesity can occur in any breed. Breeds more prone to obesity include:

• Labrador Retriever
• Beagle
• Bulldog
• Dachshund
• Basset Hound
• Cocker Spaniel

Allergies and Skin Infections

Skin conditions or allergies that lie beneath the surface can heighten a dog's skin sensitivity and increase the likelihood of heat rash development. 

Dogs can develop allergies to a variety of triggers, including pollen, specific foods, fleas, and environmental factors. When a dog is allergic to something, their immune system reacts excessively, leading to skin problems. Typical allergic responses in dogs encompass symptoms such as itching, redness, hives, and skin inflammation. This persistent itching and scratching can disrupt the skin's natural defenses, rendering it more susceptible to heat rash and other issues. 

Dogs with preexisting skin conditions like dermatitis or bacterial/fungal infections may experience compromised skin barriers. These conditions can weaken the skin's protective mechanisms, making it more vulnerable to heat rash, especially in hot and humid conditions. The act of scratching or excessive licking of irritated skin can introduce bacteria and worsen the problem.

Skin Folds

Breeds with skin folds, such as Bulldogs or Shar-Peis, are prone to heat rash because moisture and bacteria can accumulate in these folds, causing irritation and clogging sweat glands.

Some of the dog breeds with prominent skin folds include:

• Bulldog
• Shar-Pei
• Neapolitan Mastiff
• Bloodhound
• Basset Hound
• Pug
• Chinese Crested
• English Mastiff
• French Bulldog

How Long Does It Take for a Heat Rash to Go Away on a Dog?

The duration for a heat rash to go away on a dog can vary depending on the severity of the rash and how it's treated. Here are some general guidelines:

If the heat rash is mild and caught early, it may start to improve within a day or two of providing relief from the heat source and ensuring your dog stays cool and dry.

If the heat rash is more extensive or if it has developed into a secondary infection due to scratching and licking, it may take several days to a couple of weeks to heal. 

In severe cases where the heat rash has led to a significant skin infection or other complications, it may take longer to heal, and veterinary intervention may be necessary. 

Other Symptoms Associated with Dog Heat Rash

In addition to clinical symptoms with the skin, a dog may have heat rash if experiencing other symptoms of overheating (hyperthermia) at the same time. However, overheating or heatstroke in dogs is a more serious condition and can lead to life-threatening situations. The symptoms of overheating in dogs may include:

• Excessive panting and drooling.
• Rapid and noisy breathing.
• Inability to settle or restlessness.
• Bright red gums and tongue.
• Elevated body temperature (above 104°F or 40°C).
• Vomiting or diarrhea.
• Weakness or collapse.

If you suspect your dog is overheating, it's crucial to take immediate action to cool them down and seek veterinary attention. Overheating can be a medical emergency and may lead to organ failure or death if not treated promptly.

When to See the Vet?

Here are some guidelines on when to see a vet for a dog with a heat rash:

• Persistent Discomfort: If your dog appears to be in discomfort, constantly scratching or licking the affected area, or seems restless due to the rash, it's a sign that the condition is bothering them.
• Worsening Symptoms: If the heat rash appears to be spreading or getting worse over time, it's important to seek veterinary advice.
• Infection: Heat rash can sometimes become infected if the dog continues to scratch or if the skin is broken. Signs of infection may include redness, swelling, pus, or a foul odor. If you suspect an infection, see a vet promptly.
• Fever or Lethargy: If your dog develops a fever or becomes lethargic, it could be a sign of a more severe heat-related issue, and you should seek immediate veterinary attention.
• Breathing Problems: In severe cases of heatstroke or heat exhaustion, a dog may experience difficulty breathing. This is a medical emergency, and you should get to a vet immediately.

How to Treat Heat Rash on Dogs?

Fortunately, heat rash in dogs is manageable and preventable with some straightforward steps:

Cooling the Affected Area:

The first step is to cool down your dog and the affected area. Move your dog to a cooler, shaded area if they've been in the sun or heat.
Use a damp, cool cloth or a gentle stream of cool (not cold) water to soothe the affected area. Avoid using ice-cold water, as it can shock the dog's skin.

Topical Treatment:

Apply a soothing, hypoallergenic cream or spray to the rash to relieve itching and inflammation. Products containing natural plant-derived ingredients such as aloe vera, calendula, hydrocortisone, or colloidal silver may be appropriate, but consult your veterinarian for advice on the best products for your dog.

Ingredients Colloidal silver, Cistanche extract, Cordyceps militaris extract, Usnea Barbata extract, Centella asiatica extract, licorice root extract, and Gentiana extract.

Prevent Further Irritation:

Ensure your dog does not scratch or lick the affected area. If necessary, consider using an Elizabethan collar (the "cone of shame") to prevent your dog from reaching the rash.

Oral Medicine

If a dog develops any secondary complications from prickly heat, such as skin infections or pruritus (itching), separate oral treatment, such as antibiotics and/or antihistamines, may be required depending on the severity.

Common Antibiotics for Dogs:

• Amoxicillin: This antibiotic is often used to treat bacterial infections in dogs, such as skin infections, urinary tract infections, and respiratory infections.
• Cephalexin: Cephalexin is another antibiotic commonly prescribed for skin infections, urinary tract infections, and soft tissue infections in dogs.
• Clindamycin: Clindamycin is effective against certain bacterial infections, including dental infections and deep skin infections in dogs.

Common Antihistamines for Dogs:

Some common antihistamines for dogs include:

• Diphenhydramine (Benadryl): Benadryl is one of the most commonly used antihistamines for dogs. It can help relieve itching, allergic reactions, and mild motion sickness. 
• Cetirizine (Zyrtec): Cetirizine is another antihistamine that may be used for allergies in dogs. 
• Chlorpheniramine: This antihistamine can be used to relieve itching, sneezing, and other allergy symptoms in dogs. It's important to use the canine-specific formulation and follow your vet's dosing instructions.

Chlorpheniramine Dosage for Dogs/ Cats For small dogs (under 20 pounds or approximately 9 kilograms): 2-4 mg every 8-12 hours. For medium-sized dogs (20-50 pounds or approximately 9-23 kilograms): 4-8 mg every 8-12 hours. For large dogs (over 50 pounds or approximately 23 kilograms): 8-12 mg every 8-12 hours. For cats: 1-2mg(1/4-1/2 tablet) every 8-12 hours.

How to Prevent Heat Rash on Dogs?

Preventing heat rash in dogs is important, especially during hot weather or when they are exposed to excessive heat and humidity. Here are some steps you can take to prevent heat rash in dogs:

Grooming

Regular grooming, including brushing, can help remove excess fur and prevent heat from getting trapped close to the skin. Consider a summer haircut for long-haired breeds.

Avoid Peak Heat

Limit outdoor activities during the hottest part of the day. Early mornings and late evenings are better times for walks and play.

Hydration

Make sure your dog has access to clean, fresh water at all times. Proper hydration is essential for regulating body temperature.

Never Leave Dogs in Hot Cars

Never leave your dog unattended in a parked car, even with the windows cracked. Cars can become dangerously hot in a matter of minutes.

Conclusion

Heat rash on dogs is a common but preventable condition that can make your furry friend uncomfortable during hot weather. By taking proactive steps to keep your dog cool and comfortable and recognizing the early signs of heat rash, you can help them enjoy the summer months safely. Remember that, like humans, dogs are also susceptible to heat-related illnesses, so always prioritize their well-being when the mercury rises.