By Dr. Jake Hiller

Few skin conditions worry dog owners as quickly as a hot spot.

One day your dog's skin looks completely normal.

The next, you notice a patch of red, moist skin that's painful to the touch, and your dog can't seem to leave it alone.

Many owners assume the hot spot itself is the problem.

In reality, it's often a symptom of something much bigger.

At EastOver Veterinary, we frequently see hot spots develop because an underlying issue—most commonly allergies—has already been affecting the skin for days or even weeks. By the time the hot spot appears, the skin has been inflamed long enough for bacteria to take advantage of a weakened skin barrier.

Treating the sore is certainly important, but stopping the cycle requires understanding why it developed in the first place.

That's why we approach hot spots differently.

Instead of focusing only on the wound you can see, we work to identify the condition that created it.

What Exactly Is a Hot Spot?

A hot spot, also known as acute moist dermatitis, is a localized area of inflamed, infected skin.

Unlike many other skin conditions that develop gradually, hot spots can appear very quickly.

A dog may scratch or lick one area repeatedly after being exposed to an allergen, an insect bite, or another source of irritation.

Within hours, the skin becomes:

• Bright red
• Moist or oozing
• Painful
• Warm to the touch
• Extremely itchy

Because dogs continue licking and chewing the area, the damage spreads rapidly.

The more they irritate the skin, the larger the lesion becomes.

Hair mats over the wound.

Moisture becomes trapped.

Bacteria multiply.

Before long, what started as mild irritation has turned into a painful skin infection.

Why Allergies Are One of the Most Common Triggers

When owners discover a hot spot, they're often surprised to learn that allergies may have started the entire process.

Environmental allergies are among the most common reasons dogs become itchy.

Pollen.

Grass.

Weeds.

Mold spores.

Dust mites.

These everyday substances may seem harmless, but in allergic dogs, the immune system reacts aggressively.

Instead of ignoring these allergens, the body creates inflammation within the skin.

That inflammation causes itching.

The itching leads to scratching and licking.

Repeated licking weakens the skin's natural protective barrier, allowing bacteria that normally live harmlessly on the skin to multiply.

The result is often a hot spot.

Rather than being the primary disease, the hot spot is frequently the consequence of untreated allergic skin inflammation.

The Itch-Lick-Infection Cycle

One of the reasons hot spots can become severe so quickly is that they develop through a self-perpetuating cycle.

It often begins with a simple itch.

Your dog licks the irritated area.

Licking damages the skin.

Damaged skin becomes inflamed.

Inflamed skin becomes even itchier.

The itching encourages more licking.

As moisture builds beneath the fur, bacteria and yeast find ideal conditions for growth.

Soon, an infection develops.

That infection creates even more discomfort.

Without treatment, the cycle continues to feed itself.

This is why simply preventing your dog from licking the area isn't enough.

The inflammation and infection still need to be addressed.

Not Every Hot Spot Looks the Same

Hot spots vary considerably from one dog to another.

Some are no larger than a coin.

Others spread across a significant portion of the neck, hip, or chest within a short period.

Common locations include:

• The neck
• Behind the ears
• The cheeks
• The hips
• The thighs
• The chest
• Around the tail

The location often provides clues about the underlying cause.

For example, hot spots near the ears may develop after repeated scratching caused by allergic ear inflammation.

Lesions near the tail may suggest flea allergy dermatitis.

Areas around the paws or legs may point toward environmental allergies that have triggered excessive licking.

Understanding these patterns helps us determine what happened before the hot spot appeared.

Why Thick-Coated Dogs Are More Susceptible

Although any dog can develop a hot spot, some breeds are more likely to experience them.

Dogs with thick, dense coats retain more moisture close to the skin.

Once saliva becomes trapped beneath the fur, bacteria multiply more easily.

Breeds with heavy undercoats or long hair may also hide developing lesions until they're already quite large.

Owners often don't discover the problem until they notice an odor, wet fur, or persistent licking.

Regular grooming and routine skin checks become especially important for dogs with dense coats during allergy season.

Hot Spots Aren't Always Caused by Allergies

While allergies are one of the most common causes, they're not the only possibility.

Other triggers include:

• Flea allergy dermatitis
• Insect bites
• Minor cuts or abrasions
• Moisture trapped after swimming
• Matted fur
• Skin irritation beneath collars or harnesses
• Ear infections that lead to excessive scratching
• Pain that causes repeated licking of one area

This is another reason diagnosis matters.

The visible sore doesn't always tell the whole story.

Treating the hot spot without identifying what started it often leads to repeated episodes.

Why Early Treatment Matters

Many owners hope a hot spot will heal on its own.

Unfortunately, that's rarely what happens.

Because the lesion is intensely itchy and painful, dogs continue traumatizing the skin every time they lick or scratch.

The wound becomes larger.

Inflammation spreads.

Bacteria continue multiplying.

The earlier treatment begins, the easier it is to stop that cycle.

Prompt veterinary care not only helps relieve discomfort but also reduces the likelihood of larger infections, prolonged healing, and repeated flare-ups.

At EastOver Veterinary, our goal is to intervene before a small patch of irritation becomes a much more significant skin problem.

Treating the Hot Spot Is Only Part of the Solution

When owners bring their dog in for a hot spot, the first question is often:

"Can you treat this so it goes away?"

The answer is yes—but treating the visible sore is only part of the solution; identifying the underlying cause is crucial.

If we don't identify what caused the hot spot to develop, there's a good chance it will happen again.

That's why our approach focuses on both immediate relief and long-term prevention.

The hot spot deserves treatment.

The underlying cause deserves just as much attention.

Looking Beyond the Surface

Although hot spots are easy to recognize, they don't tell us why they developed.

Environmental allergies, flea allergy dermatitis, bacterial infections, yeast overgrowth, parasites, and even chronic ear disease can all lead to repeated scratching or licking.

At EastOver Veterinary, every itchy dog receives a comprehensive physical examination.

We evaluate:

• Where the hot spot developed
• Whether similar lesions have occurred before
• The time of year symptoms began
• Whether itching affects other parts of the body
• The condition of the ears, paws, and skin
• Signs of parasites or flea exposure
• Previous allergy history

Each piece of information helps narrow down the list of possible causes.

Instead of treating every dog the same way, we tailor our recommendations based on the individual patient.

Why Skin Cytology Is So Valuable

One of the most useful diagnostic tools for itchy dogs is skin cytology.

Although the hot spot itself may look obvious, we still need to understand what microorganisms are contributing to the infection.

A small sample is collected from the affected skin and examined under a microscope.

Within minutes, we can often determine whether bacteria, yeast, or both are present.

That information helps guide treatment.

Rather than prescribing medication based on assumptions, we can select therapies that specifically target what's happening on your dog's skin.

For many patients, this leads to faster healing and a lower risk of recurrence because we're treating the infection that's actually present—not the one we assume might be there.

Why Ear Infections and Hot Spots Often Occur Together

One of the patterns we frequently see is a dog with both recurring ear infections and recurring hot spots.

That's rarely a coincidence.

Dogs experiencing environmental allergies often develop inflammation throughout multiple areas of the body at the same time.

The ears become itchy.

The dog scratches behind the ears.

That scratching creates skin irritation.

Soon, a hot spot develops on the neck or beside the ear.

If only the hot spot is treated, the allergic ear inflammation remains.

Eventually, the scratching returns.

So does the hot spot.

Breaking this cycle means managing both conditions together rather than treating them as unrelated problems.

Why Food Isn't Usually the Main Problem

It's common for owners to wonder whether changing foods will solve recurring hot spots.

While food allergies can certainly cause skin disease, they're much less common than environmental allergies.

Most dogs that develop recurring hot spots are reacting to pollen, grasses, weeds, molds, dust mites, or flea bites—not necessarily an ingredient in their diet.

That's why repeatedly switching foods often doesn't produce the improvement owners hope for.

If a food allergy is genuinely suspected, the most reliable approach is a veterinarian-guided elimination diet using a prescription hydrolyzed or novel-protein food.

Without that structured process, it's difficult to know whether diet is actually contributing to the problem.

Modern Allergy Treatments Help Break the Cycle

Fortunately, veterinary medicine has advanced significantly over the past several years.

Today, we have treatment options specifically designed to interrupt allergic itch before it progresses into self-trauma and infection.

Depending on the individual patient, treatment may include therapies such as Cytopoint®, Apoquel®, or other medications that reduce allergic inflammation while helping dogs remain comfortable.

The best choice depends on several factors, including:

• Your dog's age
• Overall health
• Severity of symptoms
• Frequency of flare-ups
• Presence of secondary infections
• Lifestyle and environmental exposure

Every patient is different.

Our goal is to create a plan that's effective for the individual dog—not simply prescribe the same medication for every itchy patient.

Caring for the Skin Between Veterinary Visits

Medical treatment works best when paired with thoughtful home care.

Small daily habits can make a meaningful difference, especially during allergy season.

We often recommend:

• Wiping paws after outdoor walks
• Rinsing off pollen after spending time in tall grass
• Keeping the coat clean and dry
• Brushing regularly to remove debris
• Washing bedding frequently
• Maintaining year-round flea prevention
• Using veterinarian-recommended medicated shampoos when appropriate

These steps won't eliminate allergies, but they can reduce allergen exposure and help protect the skin barrier between veterinary visits.

The Importance of Monitoring Small Changes

One lesson we try to share with every family is this:

Most chronic skin disease doesn't begin with a large hot spot.

It begins with something much smaller.

A little extra licking.

An occasional ear scratch.

A paw that's chewed more often than usual.

A small patch of redness hidden beneath thick fur.

These early changes are often the first signs that inflammation is beginning.

Recognizing them early gives us the opportunity to intervene before secondary infections develop.

That often means fewer medications, shorter recovery times, and a much more comfortable experience for your dog.

Healthy Skin Supports a Healthier Dog

Healthy skin isn't simply about appearance.

It's about comfort.

A dog that's constantly scratching isn't sleeping well.

They aren't fully enjoying walks.

They may spend more time licking than playing.

They may become irritable because they're uncomfortable all day long.

Helping restore healthy skin means helping your dog enjoy everyday life again.

Running through the yard.

Playing with family.

Relaxing comfortably after a walk.

Sleeping through the night without waking up to scratch.

Those are the moments we want every dog to experience.

At EastOver Veterinary, our goal isn't just to heal today's hot spot.

It's to identify why it happened, reduce the risk of future flare-ups, and create a long-term plan that supports healthier skin through every season of your dog's life.