Home » Symptoms » Dog Symptoms A-Z » Skin and Coat Changes all over the Body

Skin and Coat Changes all over the Body in Dogs

Author: Dr. med. vet. Gisa Löwe | Last modified: 06.02.2026

Are you unsure what is wrong with your pet? Feel free to use our symptom checker for more clarity.

Skin and coat changes all over the body in dogs refer to any deviations from the normal skin and coat condition that extend over the entire body of the animal. These changes can take various forms, such as hair loss, changes in skin color or texture, as well as the appearance of scaling or ulcers.

Can Occur with the Following Diseases:

Basics and possible causes

The skin is the largest organ in the body and serves as a barrier against external influences, regulates body temperature, and plays an important role in the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body.. The coat additionally protects the skin and contributes to thermoregulation. Changes in skin and coat can therefore be attributed to a variety of internal and external factors.

One of the most common causes of skin and coat changes is an allergic reaction. Dogs can be allergic to various environmental factors such as pollen, house dust mites, or certain foods. These allergies often lead to inflammatory conditions and itching, which in turn can lead to hair loss and skin changes.

Infections caused by bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., fungi, or parasites such as fleas and mites are also common causes of skin problems. Such infections can lead to localized or generalizedGeneralized means that a disease or condition affects a large part of the body or multiple organ systems. Generalized diseases can show systemic symptoms and may require more comprehensive treatment. skin changes, depending on the type and severity of the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.. In particular, fungal infections, such as ringworm, can affect large parts of the body.

Hormonal imbalances, such as those occurring with diseases of the thyroid gland or adrenal glands, can also cause skin and coat changes. These endocrine disorders affect metabolism and skin health, leading to symptoms such as hair loss or skin thickening.

Nutritional deficiencies, especially a lack of essential fatty acids, vitamins, and minerals, can also lead to poor skin and coat health. An unbalanced diet can weaken the skin barrier and increase the risk of inflammatory conditions and infections.

Typical accompanying symptoms

Hair loss: A widespread symptom that manifests as bald spots or generally thinner hair. This may indicate allergies, hormonal disorders, or parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. infestation.
Itching: Often associated with skin irritations, itching can lead to increased scratching or licking, which further damages the skin and promotes infections.
Redness or inflammatory conditions: These occur in response to irritation or infections and can lead to pain or discomfort.
Scaling: Dry, flaking skin may be an indicationIndication refers to a valid reason or rationale for using a specific treatment, medication, or medical procedure. It is based on the diagnosis and the patient's clinical condition. of ringworm infections or nutritional deficiencies.
Changes in skin color: Pigment changes can be caused by chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. inflammatory conditions or hormonal problems.
Ulcers or crusts: These can form as a result of infections or continued scratching and licking.

When to visit the vet?

It is important to see a veterinarian if the dog’s skin and coat changes occur suddenly or worsen to rule out serious underlying health problems. If accompanying symptoms such as fever, lethargy, or loss of appetite occur, veterinary help should be sought immediately, as this may indicate systemic diseases.

Also, if the dog shows signs of pain, such as whimpering when touching the skin or when moving, an immediate visit to the veterinarian is necessary to clarify the cause of the discomfort and begin appropriate treatment.

ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. or recurring skin problems should also be clarified by a veterinarian in order to develop a long-term treatment and management strategy that improves the dog’s well-being and minimizes future problems.

Symptom recognition for animal owners and veterinary diagnostic procedures

As a pet owner, it is important to pay attention to early signs of skin and coat changes. Regular brushing and inspection of the coat can help to identify problems early. Pay attention to changes in the texture, density, or color of the coat, as well as unusual spots or scaling.

The veterinarian will usually take a comprehensive medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. to identify possible triggers. Information about diet, environment, and any incidents that may have triggered the condition are important here. A physical examination of the dog is also crucial to assess the severity of the skin and coat changes.

In addition, diagnostic tests such as skin scrapings, blood tests, or allergyAn allergy is an overreaction of the immune system to a normally harmless substance, the allergen. The reaction can include symptoms such as skin rash, itching, sneezing, respiratory distress, or in severe cases, anaphylactic shock. tests can be performed to identify specific causes. In some cases, a skin biopsyA biopsy is a medical procedure in which a small amount of tissue is removed from the body to be examined under a microscope for signs of disease. Biopsies can help diagnose cancer and other conditions. may be necessary to confirm the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and plan appropriate treatment.

What can pet owners do and professional therapy options

As a first measure, pet owners should try to relieve the itching to prevent further scratching or licking. This can be done through the use of special, pet-friendly skin care products that contain soothing ingredients such as aloe vera or oatmeal.

It is also advisable to check the dog’s environment and remove possible allergenic substances. This includes regularly washing dog beds and blankets, as well as avoiding known allergens outdoors.

A balanced diet rich in essential fatty acids and nutrients can help improve skin health and strengthen the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body.. In some cases, supplementing the diet with omega-3 and omega-6 fatty acids may be helpful.

It is important to follow the veterinarian’s instructions and regularly apply prescribed medications or topicalTopical refers to the direct application of medications or treatments to the skin or mucous membranes for a local effect, without being absorbed into the body. treatments. Consistent treatment can help control symptoms and improve the dog’s quality of life.

Outlook on current research

Current research places an increased focus on the genetic components that can lead to skin and coat changes in dogs. Scientists are investigating genetic markers associated with certain skin diseases to enable better diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and more targeted therapies. Genome-wide association studies (GWAS) help to identify the genetic basis of skin diseases that manifest as changes in the coat and on the skin.

Another area of research focuses on the role of the skin microbiome in the health of coat and skin in dogs. Studies are investigating how the balance of microorganisms on the skin affects susceptibility to infections and allergic reactions. Manipulation of the skin microbiome could potentially offer new approaches to the treatment or preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of skin and coat problems.

In addition, much research is being conducted on the effects of environmental factors on skin and coat changes. Factors such as nutrition, stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., climate change, and pollution are considered possible triggers for skin problems in dogs. Researchers are investigating how a changed diet or the reduction of environmental pollution can reduce the risk of skin diseases.

The development of new therapeutic approaches is also the focus of current studies. Researchers are working on the development of topicalTopical refers to the direct application of medications or treatments to the skin or mucous membranes for a local effect, without being absorbed into the body. and systemic treatments that specifically target the molecular mechanisms of skin and coat changes. This includes the testing of new drugs that act on inflammatory conditions or the body’s immune responseAn immune response is the immune system's reaction to foreign substances (antigens), such as microorganisms or proteins. It involves a series of processes aimed at recognizing, fighting, and eliminating these antigens. to alleviate symptoms.

The application of biotechnology and nanotechnology also opens up new possibilities in research. Nanoparticle-based drugs and biotechnologically produced skin replacement materials could play a role in the treatment of serious skin problems in dogs in the future.

An emerging area is personalized veterinary medicine, in which treatments are tailored based on an individual dog’s genetic and environmental factors. These tailored approaches could significantly improve the effectiveness of treatments for skin and coat changes and reduce side effects.

Research into the use of stem cells in the treatment of skin and coat problems is also promising. Stem cells could potentially increase the regeneration potential of damaged skin tissue and accelerate recovery. However, these approaches are still in an early stage of development.

Interdisciplinary collaborations between veterinarians, geneticists, microbiologists, and environmental scientists promote a more comprehensive understanding of the complexity of skin and coat changes in dogs. Through this collaboration, innovative solutions can be developed that include both preventive and therapeutic measures.

Overall, research shows that skin and coat changes in dogs are a multifactorialMultifactorial refers to conditions or diseases that arise from the interplay of several causes or risk factors. In dogs and cats, these can be genetic predispositions, environmental influences, and nutritional factors that together lead to health problems. problem that requires a holistic approach. Advances in research promise to improve the quality of life of affected dogs and offer new treatment options.

Frequently asked questions

What are the most common causes of skin and coat changes in dogs? Skin and coat changes can be caused by a variety of factors, including allergies, parasites, infections, hormonal imbalances, and nutritional deficiencies.
How do I recognize skin and coat changes in my dog? Signs can be hair loss, redness, itching, scaling, discoloration, and skin thickening. A veterinarian should be consulted for such symptoms.
Can skin and coat changes in dogs heal on their own? Some mild cases may improve on their own, but it is important to identify and treat the cause to avoid further complications.
How can I prevent skin and coat problems in my dog? A balanced diet, regular grooming, protectionProtection refers to safeguarding against diseases or harm. In veterinary medicine, this can include protecting animals through vaccinations, the use of parasite control products, or providing a safe environment. against parasites, and stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. reduction can help prevent skin and coat problems.
Do genetic factors play a role in skin problems in dogs? Yes, genetic predispositions can make certain breeds more susceptible to skin problems. Certain genetic mutations are associated with specific skin diseases.
Are certain dog breeds more susceptible to skin and coat changes? Yes, breeds such as Bulldogs, Shar-Peis, and West Highland White Terriers are more commonly affected due to their genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases..
Can environmental factors cause skin and coat changes in dogs? Yes, environmental factors such as temperature changes, humidity, pollutants, and chemicals can affect skin health and lead to changes.
How are skin and coat problems diagnosed in dogs? The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made through a thorough clinical examination, skin samples, blood tests, and other diagnostic procedures to determine the underlying cause.
What treatments are available for skin and coat changes in dogs? The treatment depends on the cause and may include medications, topicalTopical refers to the direct application of medications or treatments to the skin or mucous membranes for a local effect, without being absorbed into the body. treatments, dietary changes, or behavioral adjustments.
When should I see a veterinarian if my dog shows skin and coat changes? A veterinarian should be consulted if the changes occur suddenly, persist for a long time, or the dog shows severe discomfort, such as itching or pain.