Dog Skin Problems: Signs, Causes & Treatment Guide

If your dog has been scratching nonstop, licking one spot, or showing red bumps, scaly skin, hair loss, or skin sores, you may be wondering: What do dog skin problems look like? Skin problems in dogs can appear in many ways, from mild skin irritation to painful hot spots, fungal infections, or serious skin infections.

 

Your dog’s skin is one of the first places you may notice signs of an underlying health condition. Insect bites, allergies, external parasites, or yeast infections cause some dog skin issues. Others may be linked to the dog’s immune system, autoimmune diseases, or even a genetic disease that affects dog breeds differently.

 

Below, we'll cover common canine skin conditions, what they look like, and when to seek veterinary care. For more guidance on keeping your dog healthy, visit our expert dog care advice.

 

 

Common Dog Skin Problems and What They Look Like

1. Allergies and Canine Atopic Dermatitis

Allergies are one of the most common causes of skin conditions in dogs. A dog may have an allergic reaction to food, pollen, dust mites, grass, cleaning products, flea bites, or other environmental triggers. Canine atopic dermatitis, also called atopic dermatitis, is a chronic allergic skin condition that can cause ongoing itching and inflammation.

What it looks like:

• Red or inflamed skin

• Intense itching

• Hair loss from scratching or licking

• Red bumps or a dog’s rash

• Chronic ear infections

• Irritated paws, belly, face, or skin folds

Atopic dermatitis can affect dogs of any breed, but some dog breeds are more prone to allergy-related skin disease. Because allergies often have an underlying cause, your vet may recommend allergy testing, Diet changes, including a canine multivitamin supplement to support skin and coat health from within, topical treatments, oral medications, or medicated shampoos as part of a treatment plan.

 

2. Hot Spots or Acute Moist Dermatitis

Hot spots, also known as acute moist dermatitis, are red, moist, painful areas of skin inflammation. They can appear suddenly and spread quickly, especially when a dog keeps licking, biting, or scratching the area.

What it looks like:

• Raw, wet, red patches

• Skin sores that may ooze

• Hair loss around the affected area

• Pain, swelling, and intense itching

• A bad smell if a bacterial infection develops

 

Hot spots are often triggered by insect bites, allergies, poor grooming, moisture trapped in the pet’s coat, or other factors that prevent normal healing. Dogs with hot spots may need the area clipped and cleaned to allow the skin to breathe. Vets may prescribe topical treatments, oral antibiotics, or anti-itch medication depending on the severity of the condition.

 

3. Bacterial Skin Infection

A bacterial skin infection can happen when bacteria enter damaged skin. Scratching, licking, allergies, parasites, or skin wounds can damage skin cells and hair follicles, allowing bacteria to grow.

What it looks like:

• Red, inflamed skin

• Pus-filled bumps or pimples

• Crusty patches

• Skin lesions

• Hair loss

• Bad odor

• Skin sores that do not heal

A bacterial infection is generally treated with veterinary medicine such as oral antibiotics, medicated shampoos, or topical treatments. If your pet is showing signs of swelling, pus, pain, or spreading redness, contact your vet immediately for an accurate diagnosis and appropriate treatment.

 

4. Yeast Infections

Yeast infections are another common dog skin condition. They often affect dogs with allergies, oily or wrinkly skin, or skin folds where moisture can get trapped.

What it looks like:

• Greasy or thickened skin

• Musty or unpleasant odor

• Darkened patches of skin

• Redness and itching

• Ear infections

• Brown discharge in the ears

• Licking or chewing paws

Yeast infections commonly affect the ears, paws, armpits, belly, and skin folds. Some dog breeds with wrinkly skin may be more prone to yeast infections because their folds trap moisture and warmth. Your veterinary team may recommend antifungal medications, medicated shampoos, ear treatments, or other treatment options.

 

5. Mange and External Parasites

External parasites such as mites, fleas, and ticks can cause serious skin problems in dogs. Mites cause mange and may lead to intense itching, scaly skin, and hair loss. Sarcoptic mange can spread through contact with infected animals, while demodectic mange is often linked to a weakened immune system.

What it looks like:

• Severe itching

• Bald patches

• Scaly skin

• Crusty or irritated skin

• Red bumps

• Thickened skin in severe cases

Parasites can also trigger flea allergy dermatitis, which may cause severe itching from even one flea bite. Because some parasites can spread to other pets or people, pet owners should seek professional veterinary advice if they suspect mange, fleas, or mites.

 

6. Fungal Infections Like Ringworm

Fungal infections can also affect a dog’s skin. Ringworm is one of the most recognizable fungal skin problems in dogs. Despite the name, ringworm is not a worm. It is a fungal infection that can spread between animals and humans.

What it looks like:

• Circular patches of hair loss

• Scaly skin

• Red or crusty edges

• Broken hairs

• Mild skin problems at first that may spread

Ringworm and other fungal infections need veterinary care because they are contagious. Your vet may recommend antifungal medication, topical treatments, medicated shampoos, and home cleaning to prevent reinfection.

 

7. Contact Dermatitis

Contact dermatitis occurs when a dog’s skin reacts to an irritant or allergen. This may include grass, plants, carpet cleaners, shampoo, household chemicals, or certain fabrics.

What it looks like:

• Red, itchy skin

• Small bumps

• Skin irritation on the belly, paws, or areas with less fur

• Swelling or inflammation

• Licking or scratching after exposure

Mild skin problems from contact dermatitis may improve once the trigger is removed, but persistent symptoms need veterinary care. Your vet can help identify the underlying cause and recommend appropriate treatment.

 

8. Acral Lick Dermatitis

Acral lick dermatitis happens when a dog repeatedly licks one area, usually on the leg or paw. Over time, this can damage the skin and prevent normal healing.

What it looks like:

• Thickened skin

• Open sores

• Hair loss in one specific area

• Red or irritated skin

• A wound that keeps reopening
  

A proper treatment plan may include wound care, oral medications, topical treatments, behavior support, and treatment of the underlying cause.

This condition may be linked to allergies, pain, boredom, anxiety, joint issues, or another underlying health condition if joint discomfort is a factor, our canine leg pain home remedies guide may offer helpful context.

 

9. Autoimmune Skin Diseases

Immune system problems cause some dog skin conditions. Autoimmune skin diseases happen when the dog’s immune system mistakenly attacks healthy skin cells.

Examples include discoid lupus erythematosus and systemic lupus erythematosus. These conditions are less common but can cause serious skin disease.

What it looks like:

• Crusting around the nose, face, or ears

• Skin sores

• Ulcers

• Hair loss

• Scaly skin

• Skin lesions that may worsen in sunlight

Autoimmune diseases require professional veterinary advice and an accurate diagnosis. Your vet may perform blood tests, skin scrapings, biopsies, or other diagnostics before recommending treatment options.

 

 

Dog Breeds More Prone to Skin Problems

Skin problems can affect dogs of any breed, but some breeds are more prone to certain dog skin conditions. Breeds with wrinkly skin, thick coats, or allergy-prone genetics may need extra skin care.

Dog breeds that may be more likely to develop skin issues include:

• Bulldogs

• French Bulldogs

• Shar Peis

• Golden Retrievers

• Labrador Retrievers

• German Shepherds

• Cocker Spaniels

• West Highland White Terriers

• Pugs

This does not mean every dog in these breeds will develop skin problems. It simply means some skin conditions may affect dog breeds differently due to coat type, skin folds, immune system factors, or genetic disease.

 

 

How to Treat Dog Skin Problems

The right treatment depends on the underlying cause. A skin infection, allergy, fungal infection, hot spot, parasite problem, or autoimmune disorder may all require different care.

Common treatment options may include:

• Medicated shampoos

• Colloidal oatmeal shampoo for soothing mild irritation

• Topical treatments

• Oral medications

• Oral antibiotics for bacterial infection

• Antifungal medication for fungal infections or yeast infections

• Flea, tick, or mite prevention

• Allergy management

• Diet changes

• Wound cleaning and protection

Long-term treatment plan for chronic skin conditions Some pet owners also support their dog's skin health with a dog probiotic supplement for gut-skin balance, or explore a dog CBD tincture collection for supplemental comfort as covered by the AKC: CBD Oil for Dogs — What You Need to Know and supported by PubMed: Pharmacokinetics, Safety, and Clinical Efficacy of CBD in Dogs.

Never use human creams or medications without veterinary guidance. Some products made for people can be unsafe for dogs.

 

 

When to See a Vet Immediately

Contact your vet immediately if your dog has:

• Rapidly spreading redness

• Open skin sores

• Pus or bleeding

• A strong odor from the skin

• Severe pain

• Intense itching that will not stop

• Hair loss with crusting or scabs

• Swelling of the face or body

• Signs of infection

• Skin lesions that keep coming back

• A pet showing signs of fever, weakness, or loss of appetite

Your veterinary team can provide an accurate diagnosis and create a treatment plan based on your dog’s symptoms.

 

 

Frequently Asked Questions

What do dog skin problems look like?

Dog skin problems may look like red bumps, scaly skin, hair loss, skin sores, circular patches, hot spots, rashes, crusty areas, darkened skin, or irritated skin folds. Some conditions cause mild skin problems, while others may lead to infection, pain, and severe itching.

 

How do I know if my dog has a skin infection?

A skin infection may cause redness, swelling, pus, odor, scabs, skin lesions, hair loss, or pain. Your dog may constantly lick, chew, or scratch the area. A bacterial skin infection often needs veterinary care and may be treated with oral antibiotics, medicated shampoos, or topical treatments.

 

Are dog skin problems contagious?

Some dog skin conditions are contagious, including ringworm and sarcoptic mange. These can spread through contact with infected animals, contaminated bedding, grooming tools, or close contact. If you suspect a contagious skin condition, separate pets and seek professional veterinary advice.

 

Can allergies cause chronic ear infections in dogs?

Yes. Allergies and canine atopic dermatitis can cause chronic ear infections in some dogs. Dogs with recurring ear problems may also have itchy paws, red skin, hair loss, or skin inflammation.

Can I treat my dog’s rash at home? You may be able to soothe mild skin irritation with a vet-approved bath, colloidal oatmeal shampoo, or CBD dog biscuits to help ease stress-related scratching, but you should not rely on home care if symptoms are severe, spreading, or painful.

If your dog’s rash includes pus, sores, intense itching, or hair loss, contact your vet for appropriate treatment.

 

Why does my dog keep getting skin problems?

Allergies, external parasites, yeast infections, bacterial infections, autoimmune diseases, hormonal problems, or other underlying health conditions may cause recurring dog skin issues. A vet can help identify the underlying cause and recommend a long-term treatment plan. Digestive health can also affect the skin if you've noticed unusual changes in your dog's stool alongside skin issues, our white dog poop guide explains what those changes may signal.

 

 

Final Thoughts

Dog skin problems can look different depending on the cause. Some may appear as red bumps, scaly skin, hair loss, hot spots, or skin sores. Others may involve yeast infections, fungal infections, bacterial infections, contact dermatitis, autoimmune skin diseases, or canine atopic dermatitis.

The most important step is to monitor your dog’s symptoms and seek veterinary care when needed. Early diagnosis and appropriate treatment can help your dog feel better, prevent infection, and support healthy skin.

Helpful note: If you are unsure about your dog’s skin condition, take clear pictures of the affected area and share them with your veterinary team. Photos can help your vet understand how the condition is changing and guide the next steps for treatment.