Heat Rash in Dogs: Expert Guide to Identification, Management, and Prevention

Most pet owners routinely inspect their dog’s skin and coat, looking for lumps, bumps, or signs of fleas and ticks after a walk. In hot, humid weather, dogs are more susceptible to skin problems such as yeast infections and hot spots. But can a dog develop a heat rash similar to that seen in humans?

Can Dogs Get Heat Rash?

Yes. Heat rash is more common during the warmer months but can also arise when a dog is exposed to inappropriate heat sources—such as heating pads—anytime of year. Prolonged exposure to high temperatures can trigger a rash in any dog, but certain breeds and physical traits increase the risk.

Dogs with short, fine coats, prominent skin folds, and short snouts—brachycephalic breeds like Pugs, Bulldogs, and Shih Tzus—have a harder time cooling themselves. Their narrowed airways and less effective panting make heat dissipation less efficient. Areas with little fur provide an easy pathway for heat and moisture to accumulate, especially in overweight dogs. When these conditions are left untreated, secondary skin infections can develop and overall body temperature can rise.

Living in hot, humid climates also heightens the likelihood of heat rash.

What Does Heat Rash Look Like on Dogs?

Heat rash can vary in severity. Early signs include small, itchy red bumps and general redness, often concentrated in areas with sparse fur. Common sites are the groin, armpits, and belly—places where heat and moisture accumulate.

If left untreated, these bumps can evolve into larger raised lesions, blisters, or even painful boils. The presence of blisters indicates a second‑degree reaction, which makes the skin more susceptible to bacterial or fungal infections that can produce pustules and widespread irritation.

To help determine whether your dog has a heat rash rather than another skin issue, consider the following questions:

• Has your dog been outdoors in heat or used a heating device for an extended period?
• Does your dog have a short snout, skin folds, or excess weight that might impair cooling?
• Has your dog been exposed to any irritants or potential allergens?

Other Symptoms Associated with Dog Heat Rash

Heat rash often appears alongside signs of overheating, or hyperthermia. Look for:

• Excessive panting or noisy breathing
• Difficulty settling or restlessness
• Bright red gums (normal gum color is a bubble‑gum pink)

If you can measure your dog’s temperature, a normal range is 100–102.5 °F, depending on stress level. A temperature of 103 °F or higher that does not decrease with cooling measures warrants immediate veterinary attention.

Home management should begin by removing the dog from the heat source, cooling the animal with cool wet towels and fans, and soothing the skin with a low‑strength hydrocortisone cream or aloe. Avoid plunging the dog into ice‑cold water, which can shock the animal.

If symptoms persist or worsen, a veterinarian should examine the dog. A thorough physical exam will confirm the diagnosis, assess affected skin, gum color, and core temperature.

In uncomplicated cases, a vet may prescribe a prescription‑strength hydrocortisone cream or spray to reduce inflammation. Cooling techniques—such as applying alcohol to paw pads, placing cool towels under the armpits and groin, or using an air‑circulator—can help lower body temperature.

Secondary complications like bacterial infections or severe itching may require oral antibiotics or antihistamines, depending on severity.

Mild cases usually resolve within a few days of appropriate home care, but if the dog does not improve or shows systemic signs of hyperthermia, seek veterinary care immediately to prevent organ damage.

How to Prevent Heat Rash on Dogs

Maintaining a cool, low‑humidity environment is the best defense against heat rash. During summer, schedule walks in the early morning or late evening when temperatures are lower. Lightly dampening the coat and fanning during activity can help keep the dog’s core temperature down.

Always provide ample fresh water, shade, and cooling options. Understanding your dog’s risk factors and proactively mitigating them is the cornerstone of prevention.