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Heat Rash in Dogs Causes: Treatment, armpit, ear, how do you treat Heat Rash in Dogs?



Heat rash in dogs, also known as “prickly heat,” is caused by excessive heat and humidity, which can lead to the blockage of sweat glands. When sweat glands become blocked, sweat cannot escape, leading to inflammation and the formation of small, red bumps on the skin.

Some common causes of heat rash in dogs include:

  1. Hot and humid weather: Dogs are more prone to heat rash during the summer months, especially in areas with high humidity.
  2. Overexertion: Dogs that are overexerted or exercised in hot weather are more likely to develop heat rash.
  3. Obesity: Overweight dogs are more prone to heat rash due to the additional insulation provided by their body fat.
  4. Thick fur: Dogs with thick coats are more prone to heat rash as their fur can trap heat and sweat against their skin.
  5. Poor grooming: Dogs with matted or dirty fur are more prone to heat rash as it can prevent sweat from evaporating properly.

It is important to note that some breeds are more prone to heat rash than others, including Bulldogs, Pugs, and other breeds with flat faces and short muzzles.

Heat Rash in Dogs Causes: Treatment, armpit, ear, how do you treat Heat Rash in Dogs?

What Is Heat Rash in Dogs?

Heat rash is a skin condition that can occur when dogs become overheated in hot and humid conditions. It’s similar to heat rash in humans, which is sometimes called “prickly heat.” Heat rash in dogs occurs when a dog’s skin is unable to cool down properly, leading to irritation, inflammation, and the development of small bumps or blisters.

Dogs don’t sweat the way people do. Instead, they cool off by panting, which is not very efficient in hot environments. As a dog’s body temperature rises, they can develop a heat rash, heat exhaustion, or even heat stroke. It’s essential to move your dog to a cool, shaded area and offer fresh water at the earliest signs of overheating.

Symptoms of Heat Rash in Dogs

Heat rash typically manifests as redness, small bumps, or blisters on the skin, particularly in areas where there is friction or where the fur is thicker, such as the armpits, groin, neck, and under the chin. It may also occur within the skin folds and on the abdomen.


  • Redness that may be blotchy
  • Bumps, blisters, sores, or scabs
  • Tenderness
  • Itchiness
  • Hair loss

Areas affected by heat rash may appear red, inflamed, or irritated. Small, raised bumps or blisters may be present on the skin and can be itchy or painful. In severe cases or with prolonged irritation, hair loss may occur. Dogs with heat rash may exhibit signs of discomfort, such as excessive scratching or licking of the affected areas.

What Causes Heat Rash in Dogs?

Heat rash is most likely to occur during hot and humid weather when dogs are unable to regulate their body temperature effectively.

  • Dogs kept in poorly ventilated areas or confined spaces are more susceptible to developing heat rash due to a lack of airflow to the skin.
  • Overexertion or prolonged exercise in hot conditions can contribute to the development of heat rash.
  • Dogs with dense coats or skin folds are more prone to developing heat rash, as the trapped heat and moisture contribute to skin irritation.
  • Brachycephalic (flat-faced) dog breeds are especially prone to overheating.

It’s important to consult with a veterinarian if you suspect your dog has heat rash or any other skin condition. They have the expertise to accurately diagnose the condition and recommend appropriate treatment options tailored to your dog’s specific needs.

How Do Vets Diagnose Heat Rash in Dogs?

Diagnosing heat rash in dogs typically involves a combination of physical examination, medical history review, and sometimes additional tests. The veterinarian will thoroughly examine your dog’s skin and ask questions about your dog’s recent activities, exposure to hot and humid environments, and any changes in behavior or discomfort that you may have noticed.

Your vet will rule out other possible skin conditions, such as allergies, fungal or bacterial infections, insect bites, or other underlying skin conditions. This helps ensure an accurate diagnosis specifically related to heat rash.

How to Treat Heat Rash in Dogs

The treatment of heat rash in dogs focuses on alleviating discomfort, reducing inflammation, and promoting healing of the affected skin. Some cases of heat rash can be treated at home, but it’s crucial to consult a vet first.

If you notice any signs of heat rash or heat exhaustion, move your dog to a cool and well-ventilated area and contact your vet. You can apply a cool compress or damp towel to the affected areas to soothe the skin. Never use ice directly on the skin as it may cause additional damage. After cooling, keep the area clean and dry to avoid trapping moisture, which can worsen the rash.

Your veterinarian may recommend a soothing topical cream, ointment, or spray to relieve itching, reduce inflammation, and promote healing. In cases of severe inflammation or infection, your veterinarian may prescribe oral medications such as corticosteroids to help control the symptoms. Antibiotics may be necessary if an infection is present.

It’s important to prevent self-inflicted damage while your dog is healing. Use an Elizabethan collar (cone) or a T-shirt to prevent your dog from licking or scratching the affected areas as this can exacerbate the condition. Avoid exposing your dog to hot and humid conditions, which may worsen the rash.

If the heat rash does not improve despite treatment, it is important to consult your vet for further evaluation and potential adjustments to the treatment plan.

Remember, each dog is unique, and the treatment approach may vary based on the severity of the heat rash and your vet’s recommendations. It is always best to consult with a veterinary professional for an accurate diagnosis and tailored treatment plan for your dog’s specific needs.

Prognosis for Dogs With Heat Rash

The prognosis for dogs with heat rash is generally good, especially when diagnosed and treated promptly. With proper care and management, most cases of heat rash in dogs can be resolved quickly. However, the prognosis may vary depending on the severity of the condition and any underlying factors. Additionally, dogs with certain predisposing factors, such as thick coats or skin folds, may be more prone to recurrent heat rash, requiring ongoing management and preventive measures.

How to Prevent Heat Rash in Dogs

Preventing heat rash in dogs involves taking proactive measures to keep them cool and minimize their exposure to hot and humid conditions. If you live in an area with consistently high temperatures or have concerns about your dog’s heat tolerance, consult your vet for specific recommendations and preventive measures.

Keep a Cool Environment

Make sure your dog has access to shaded areas where they can seek relief from direct sunlight and ensure proper airflow and ventilation in their living space to prevent overheating. Set up fans or provide cool, circulating air in your dog’s living area. You can also provide cooling beds or cooling mats for your dog’s comfort. Keep your dog well-hydrated by providing a constant supply of fresh, cool water. Ensure water bowls are easily accessible and refill them regularly throughout the day.

Carefully Time Activities

Avoid vigorous physical activity during the hottest parts of the day. Instead, schedule walks and playtime in the early morning or late evening when temperatures are cooler. Avoid walking your dog on hot pavement or other surfaces that can retain heat and burn their paws. Stick to grassy or shaded areas for walks and exercise.

Supervise Outdoor Time

Supervise your dog’s outdoor activities and be mindful of their exposure to direct sunlight and high temperatures. Bring them indoors or to a shaded area if you notice signs of overheating or discomfort. Some dogs benefit from cooling products such as vests, bandanas, or misting systems that can keep them cool while on the go. Consult with your vet to determine if these accessories are suitable for your dog.

Groom for the Weather

Keep your dog’s coat well-groomed, especially during the summer months. Brushing helps remove excess fur, promotes air circulation, and prevents matting, which can contribute to heat rash. If your dog has a thick coat or is prone to matting, consider seeing a professional groomer on a regular basis.

By implementing these preventive measures, you can help safeguard your dog from heat rash and other heat-related ailments. Remember, early prevention is key to ensuring your dog stays comfortable, healthy, and safe during hot weather.

Christy Avery has worked as a veterinary technician for more than five years, caring for both domestic and exotic animals. She has received training as a Fear Free Certified Professional to prevent and treat pet anxiety, fear, and stress.