5 Skin Issues That Peak in Late Summer in Dogs

Late summer brings longer days, rising temperatures, hot weather, and warm temperatures, along with plenty of opportunities for spending time outdoors and outdoor adventures with your dog. But while you’re soaking up the sun and enjoying those last warm-weather hikes or park visits, your dog’s skin could be under siege. Skin issues are one of the most common health problems dogs experience during this time of year. Increased humidity, extended time outdoors, peak allergen levels, and heightened insect activity all contribute to a seasonal spike in skin-related concerns.

In this blog, you’ll learn:

• Why late summer is a hotspot for dog skin problems

• The five most common late-summer skin conditions in dogs

• How to spot signs early and act fast

• Preventive steps for long-term skin health

• How Scenthound supports your dog’s wellness journey

Why Late Summer Causes Skin Issues in Dogs

Dogs are naturally more exposed to skin irritants during late summer due to their lifestyle, anatomy, and environmental conditions. While many dog parents think itchy skin is just “part of being a dog,” persistent or worsening symptoms are often signs of deeper issues. Let’s take a closer look at the seasonal triggers.

1. Environmental Exposure Dogs spend more time outdoors in the summer—running through grass, rolling in the yard, or lying in sun-soaked spots. This increased exposure brings them into contact with pollen, weeds, mold spores, and other allergens that can trigger contact dermatitis or atopic dermatitis.

2. Heat and Humidity High temperatures combined with humid weather create a perfect environment for moisture to get trapped against the skin. This leads to bacterial or yeast overgrowth, especially in areas where airflow is restricted (like under collars, in skin folds, or behind ears).

3. Peak Insect Activity Fleas, ticks, mosquitoes, and other biting insects are at their most active during the late summer months. These pests can not only bite but also transmit allergens and irritants that can wreak havoc on a dog’s skin.

4. UV Radiation Many dog breeds, especially those with light-colored or thin coats, are prone to sunburn or photosensitivity reactions. Prolonged sun exposure can cause damage to unprotected skin, particularly on the nose, ears, and belly.

The Role of the Immune System in Your Dog’s Skin Health

Your dog’s immune system is the first line of defense against a wide range of skin diseases, including bacterial infections, viral infections, and fungal infections. When the immune system is functioning well, it helps protect your dog from developing skin rashes, itchy rash, and irritated skin—problems that are frequently observed during the warmer seasons.

However, certain factors can weaken this natural defense. Genetic disorders, exposure to the sun, and changing climatic factors can all impact how effectively your dog’s immune system guards against threats. This can lead to an increased prevalence of skin diseases like atopic dermatitis and seborrheic dermatitis, especially as temperatures rise. By understanding the vital role the immune system plays in skin health, dog owners can take proactive steps to support their pet’s overall wellness and reduce the risk of skin problems.

1. Seasonal Allergies and Atopic Dermatitis

Atopic dermatitis, also called atopic dermatitis in medical terms, is a genetically inherited condition that affects a large percentage of dogs, especially breeds like Golden Retrievers, Bulldogs, Boxers, and Terriers. This genetic disorder is one of the most common skin diseases in dogs. Late summer sees a rise in airborne allergens like grass pollens, mold, and ragweed, all of which can exacerbate symptoms.

Common signs:

• Persistent scratching, especially around the face, feet, ears, and belly

• Chewing or licking paws

• Red or inflamed skin

• Recurrent ear infections

It's important to recognize the early stages of atopic dermatitis, as prompt intervention can help manage symptoms before they worsen.

How to support your dog:

• Keep windows closed during high pollen days

• Use an air purifier indoors

• Bathe your dog routinely

• Establish a monthly wellness routine focused on skin health

Mild cases of atopic dermatitis may be managed with at-home care, but more severe or persistent eczema cases require veterinary attention.

Dogs with atopic dermatitis often need lifelong management. Identifying the seasonal triggers early and staying on top of symptoms with consistent care is key to preventing more severe flare-ups.

2. Plant-Related Irritation and Contact Dermatitis

Not all plants are dog-friendly. Certain common plants—like ragweed, poison ivy, Bermuda grass, or lantana—can cause topical irritation that leads to itchy, inflamed skin. In some cases, exposure to these plants can result in irritant contact dermatitis, a specific inflammatory reaction caused by direct contact with plant irritants. While not all dogs are sensitive to the same plants, exposure combined with warm, damp conditions increases the risk of irritation.

What to watch for:

• Red, raised bumps or dry, flaky patches on affected areas with thinner fur

• Sudden itching after walks or playtime in the yard, especially on affected areas

• Crusting, small blisters, or scaly skin on affected areas

• Secondary infection due to intense scratching

Steps to prevent plant-related irritation:

• Learn which local plants are known to cause skin irritation

• Avoid letting your dog walk through dense brush or tall grass

• Wash or wipe your dog down after outdoor time, especially if they roll around in vegetation

• Monitor for delayed symptoms, as reactions may take 24–72 hours to appear

If your dog has a history of skin sensitivity, keep walks limited to paved or manicured areas during high-allergen seasons and consult your vet about barrier sprays or topical antihistamines.

Most rashes from plant exposure are mild and resolve with basic care at home but if you notice any concerning symptoms, make sure to contact your Vet.

3. Hot Spots and Heat Rash (Acute Moist Dermatitis)

Hot spots are one of the most urgent and uncomfortable skin issues dogs face in the summer. These moist, inflamed lesions typically appear on the neck, hips, or limbs and are caused by a combination of self-trauma (licking or scratching) and bacterial infection. Heat and moisture can disrupt skin cells, weakening the skin barrier and making it more susceptible to irritation and infection.

Early symptoms include:

• Localized areas of intense redness

• Hair loss in one spot

• Sticky or weeping sores

• A strong, unpleasant smell

What contributes to hot spots:

• Water trapped under the fur after swimming or bathing

• Flea bites or allergic reactions

• Poor air circulation around dense or matted fur

• Tight-fitting gear like collars or harnesses

Treatment tips:

• Carefully clip the fur around the affected area to improve airflow

• Gently clean the area with an antiseptic solution

• Use a dog-safe topical medication to reduce inflammation (We love Houndswell’s Skin Relief Spray!)

• Prevent your dog from licking or biting the area using a cone or recovery collar

Heat rash, also known as prickly heat, is another form of skin irritation that develops when sweat glands become blocked, leading to red, bumpy skin and discomfort. Dogs don’t sweat the way humans do, but they still have sweat glands in their paw pads and other areas prone to overheating.

4. Bacterial and Yeast Infections

The late summer heat leads to more sweating, more swimming, and more opportunities for moisture to linger on the skin. In dogs, this creates the perfect storm for microbial overgrowth, especially in breeds with skin folds (like Pugs or Bulldogs) or thick, double coats. Bacterial and yeast infections are types of infectious diseases that tend to peak in late summer due to these environmental conditions.

Bacterial infection signs:

• Inflamed skin that is warm to the touch

• Pus or discharge

• Hair loss in circular patterns

• Crusty or ulcerated lesions

Yeast infection signs:

• Musty or “cheesy” odor

• Greasy, thickened skin

• Discoloration (brown or black patches)

• Chronic paw licking

Secondary infection is a common complication of untreated skin lesions, so prompt attention is important. If you notice any of these symptoms it may be time for a Vet visit.

What to do:

• Keep high-risk areas dry and clean

• Use medicated wipes between wellness visits

• Schedule regular wellness care to catch issues before they spread

• See a vet for prescription antifungal or antibacterial treatment if infections persist

Chronic skin infections can indicate an underlying issue like an allergy, hormonal imbalance, or weakened immune system. If your dog has recurring infections, a deeper diagnostic workup may be necessary.

5. Flea-Related Dermatitis and Insect Bite Reactions

Fleas are more than just a nuisance—they can cause serious skin inflammation and trigger allergic reactions in many dogs. Flea allergy dermatitis (FAD) is one of the leading causes of late-summer itching and discomfort. Some parasites burrow into the skin, leading to irritation and allergic reactions in affected areas.

Symptoms of flea-related skin issues:

• Hair loss at the base of the tail or inner thighs

• Small red bumps or scabs

• Constant biting or scratching

• “Flea dirt” visible on the skin (looks like black pepper)

Tips for prevention and management:

• Stick to a year-round flea prevention regimen

• Wash bedding and vacuum carpets regularly

• Keep your lawn trimmed to minimize flea hiding places

• Do regular skin checks after walks or outdoor play

Aside from fleas, other insects like mosquitoes, gnats, and ants can also bite and irritate a dog’s skin. In some cases, these bites can lead to localized allergic reactions or even infections if scratched excessively.

Bonus: Less Common but Serious Late-Summer Skin Issues

Sunburn
Light-coated and hairless breeds are at greater risk of sunburn. The most vulnerable areas are the nose, ears, and belly. Look for dry, red, or peeling skin after sun exposure. Avoid peak sun hours and ask your vet about dog-safe sunscreen.

Photosensitivity Reactions
Certain medications or plants can make dogs more sensitive to sunlight, resulting in blistering or open sores. If your dog is taking antibiotics, anti-inflammatories, or topical treatments, be sure to ask about sun sensitivity risks. Rarely, dogs may develop polymorphous light eruption, a photosensitivity reaction that causes an itchy, red rash after sun exposure.

Skin Tumors
Late summer sun exposure can contribute to long-term damage that increases the risk of skin cancer, including malignant melanoma and squamous cell carcinoma, in dogs. While rare, it’s important to monitor any new lumps, especially in older dogs or dogs with repeated sunburn.

How to Recognize, Diagnose, and Treat Skin Issues in Dogs

Spotting the early signs of skin diseases in your dog is key to getting them the help they need. Watch for symptoms like red rash, mild swelling, fluid-filled blisters, and an itchy rash—these can all signal that something’s not right. Skin rashes can take many forms, from contact dermatitis caused by irritants like poison ivy, poison oak, or poison sumac, to allergic reactions that result in irritated skin.

If you notice any of these symptoms, it’s important to consult a veterinarian, who can diagnose the underlying cause and recommend the best treatment. Depending on the diagnosis, your vet may suggest topical steroids, calamine lotion, or antibiotics to soothe the affected area and speed up healing. In severe cases, such as heat stroke or a severe allergic reaction, immediate veterinary attention is crucial to prevent complications. Early recognition and prompt treatment can make all the difference in your dog’s recovery.

Scenthound Helps You Stay Ahead of Summer Skin Issues

At Scenthound, our focus is on preventive care, because preventing skin issues is always easier (and less costly) than treating them. We specialize in routine, tailored care that addresses the five key areas of dog wellness: Skin, Coat, Ears, Nails, and Teeth.

With monthly hygiene and personalized care, Scenthound gives dog parents peace of mind that their dog’s wellness is always being monitored. Whether you’re noticing more scratching than usual or just want to stay one step ahead, we’re here to help. Our team is trained to spot potential issues early and provide recommendations for follow-up care when needed. Plus, we help educate dog parents on seasonal changes and proactive habits, because informed care leads to healthier dogs.

When to Seek Veterinary Care for Your Dog’s Skin Problems

If you notice any unusual skin rashes, itchy rashes, or irritated skin on your dog, don’t hesitate to reach out to your veterinarian. Even mild symptoms can be the first sign of a more serious skin issue, and a professional can help determine the cause and recommend the right treatment. In cases of severe allergic reaction, heat stroke, or if your dog is having difficulty breathing, seek emergency veterinary care immediately. Prompt attention can prevent complications and ensure your dog’s skin and overall health remain in great shape. When in doubt, it’s always better to be safe and get expert advice.

Finish Summer Strong!

Late summer may be prime time for skin problems in dogs, but with the right information and a proactive approach, it doesn’t have to be a season of discomfort. From seasonal allergies and insect bites to hot spots and infections, staying alert to changes in your dog’s skin can help you act early and avoid complications.

Here’s what you can do today:

• Check your dog’s skin regularly for red spots, scabs, or unusual odors

• Maintain a wellness routine with a focus on cleanliness and hydration

• Use preventative treatments for fleas and other parasites

• Partner with professionals like the team at Scenthound to monitor your dog’s wellness year-round

At the end of the day, healthy skin isn’t just about avoiding itch—it's a reflection of your dog’s overall health. Take care of their skin now, and you’ll help them thrive through every season.