The Link Between Humidity and Hot Spots in Dogs: What You Should Know

Hot spots, or acute moist dermatitis, are painful, inflamed areas on a dog's skin that can develop quickly and become serious if not properly treated. While there are many causes of hot spots, such as allergies, parasites, or grooming habits, one often-overlooked contributor is humidity. High humidity levels create an ideal environment for bacterial growth and skin irritation, significantly increasing the risk of hot spots, especially during warmer months.

This comprehensive guide explores the connection between humidity and hot spots in dogs to effectively prevent and treat the hot spots.

Understanding Hot Spots in Dogs

What Are Hot Spots?

Hot spots are localized areas of skin inflammation and infection. They often appear as red, moist, and sometimes oozing patches on your dog’s skin. These lesions can develop quickly and are very painful. It can be year-round skin issues affecting many dogs.
Most hot spots are secondary symptoms of the underlying skin issues. Here's how they typically form:

1. Itchiness caused by underlying issues (like allergies, parasites, or infections)

2. Excessive licking, chewing, or scratching by the dog

3. Damaged skin barrier from the self-trauma

4. Introduction of bacteria or yeast to the open skin

5. Hot spots form as the damaged skin becomes inflamed and infected

Common Causes Leading to Hot Spots Include: 

• Allergies (food, environmental)

• Parasites (fleas, ticks, mites)

• Excessive licking or chewing

• Poor grooming practices

• Moisture trapped in fur (especially in humid climates)

The Link Between Humidity and Hot Spots in Dogs

Humidity as a Catalyst for Underlying Skin Issues
(A humid environment doesn’t necessarily cause the original skin problem—but it amplifies its effects by weakening the skin barrier and creating the perfect setting for infection to thrive.)



Moisture Retention in Fur

High humidity causes a dog’s coat to retain moisture, especially in long-haired or double-coated breeds. This moist environment promotes bacterial and yeast growth, which can lead to skin infections.

Skin Maceration

Humidity softens the skin and makes it more prone to breakdown. Once the skin barrier is compromised, even minor irritations can escalate into full-blown hot spots.

Increased Sweating and Saliva Accumulation

Dogs don’t sweat like humans, but areas such as paws and the groin may become damp. Additionally, if dogs lick these areas (due to itching), saliva combined with humidity creates a breeding ground for infection.

Environmental Exposures That Increase Risk

Humidity often coexists with other environmental factors that contribute to hot spot formation, such as:

• Wet grass and dew during early mornings and evenings

• Rain-soaked outdoor play

• Swimming sessions followed by poor drying

• Poor ventilation indoors, especially in rooms without AC

Humidity + Pre-Existing Conditions = High Risk

If your dog has:

• Allergies

• Food sensitivities

• Previous skin infections

• Heavy or long fur

...then humid weather acts as a force multiplier, making even minor irritants evolve into serious hot spots. That’s why preventative care during humid months is essential, especially for dogs with a history of skin issues.

Breeds Most at Risk in Humid Climates

Some breeds are more susceptible to hot spots due to their coat type or skin sensitivity:

• Golden Retrievers

• Labrador Retrievers

• German Shepherds

• Saint Bernards

• Bulldogs

• Cocker Spaniels

• Newfoundlands

Double-coated, long-haired, and heavy-shedding breeds are particularly vulnerable.

Signs of Humidity-Related Hot Spots

Early Symptoms

• Intense itching or scratching

• Chewing or licking a specific spot

• Red, warm, moist skin
  
  

Progressive Signs

• Oozing or pus-like discharge
  
  

• Foul odor

• Scabbing or hair loss around the area

Common Locations

• Neck

• Behind ears

• Groin

• Paws

• Underarms

• Base of tail

Prevention Tips

Grooming

• Regular brushing to remove loose hair

• Trimming long coats in summer (not shaving to skin)

• Professional grooming every 4–6 weeks in hot, humid months

Environmental Management

• Use air conditioning or dehumidifiers indoors

• Avoid outdoor play during peak humidity hours

• Keep bedding dry and clean

Post-Swim or Bath

• Towel dry thoroughly

• Use a blow dryer on low heat if needed
  
  

• Check ears, armpits, and paws for moisture

Diet and Immune Support

• Omega-3 fatty acids for skin health

• Balanced, high-quality diet

• Probiotics to support gut and immune function

Treating Hot Spots Triggered by Humidity

At-Home Care

• Trim fur around the hot spot

• Clean with antiseptic solution (chlorhexidine or diluted iodine)

• Apply topical treatment to manage itchiness and other symptoms
  
  Puainta® Quantum Silver Anti-itch Skin Spray is specifically designed to treat hot spot symptoms in dogs and cats, soothe, dry out, and heal damp “Hot Spots”, and help soothe red, scaly, greasy, or smelly skin. It deodorizes and helps relieve fungal and bacterial skin infections.
  
  

• Use an Elizabethan collar to prevent licking

Veterinary Treatment

• Antibiotics for secondary infections

• Corticosteroids for inflammation

• Allergy testing (if suspected)

• Possible prescription shampoos or sprays

Holistic and Supportive Options

• Aloe vera gel (dog-safe, vet-approved)

• Calendula or chamomile compresses

• Oatmeal baths (to soothe itching)

Lifestyle Adjustments for Dogs in Humid Regions

Choose Cooling Gear

• Cooling vests or mats

• Breathable harnesses

Hydration

• Ensure fresh water is always available

• Use water additives for skin health

Seasonal Check-ups

• More frequent vet visits in the summer months

• Skin and coat assessments

FAQs: 

Q1: Can humidity alone cause hot spots?

No, but it can be a significant contributing factor, especially when combined with moisture-retaining fur, allergens, or existing skin issues.

Q2: What humidity level is too high for dogs?

Anything above 60% humidity can start posing skin health risks. Dogs feel discomfort more acutely when heat and humidity combine.

Q3: How can I monitor humidity at home?

Use a hygrometer to measure indoor humidity. Ideal indoor levels for pets are between 40% and 60%.

Q4: Can hot spots recur due to climate?

Yes. Dogs living in persistently humid environments are more likely to experience recurring hot spots unless proactive prevention is in place.

Q5: Do air conditioners help reduce hot spots?

Yes. Air conditioners and dehumidifiers reduce indoor moisture and heat, making them helpful for managing skin conditions.

Q6: Are puppies and senior dogs more at risk in humidity?

Yes. Puppies have immature immune systems, and senior dogs may have slower healing and more sensitive skin.

Conclusion

Humidity is an often-overlooked but critical factor in the development of hot spots in dogs. By understanding the role environmental moisture plays, pet owners can take meaningful steps to prevent painful skin infections in their dogs. With proper grooming, environmental controls, diet, and regular vet care, your dog can stay comfortable and hot spot-free even in the muggiest seasons.

Need more help managing hot spots? Consult your veterinarian for personalized advice tailored to your dog’s needs and environment. This article is intended for informational purposes only.