What Causes Hair Loss in Cats? Vet Answers, Symptoms & Treatments

What Causes Hair Loss in Cats? Vet Answers, Symptoms & Treatments

Published Date

Published Date

November 19, 2024

November 19, 2024

Last Updated

Last Updated

July 9, 2025

July 9, 2025

What Causes Hair Loss in Cats?
What Causes Hair Loss in Cats?
What Causes Hair Loss in Cats?

Hair loss in cats, known as alopecia, is a common concern for cat owners. Alopecia in cats can be caused by a range of factors, from parasites to psychological stress, making it essential to consider the comprehensive picture of your cat’s health.

While some shedding is normal, significant hair loss may be a sign of underlying health issues. Understanding the difference between normal shedding and pathological hair loss is crucial for ensuring your cat's well-being. Alopecia in cats can appear gradually or suddenly and may affect different areas of the body, depending on the cause.

Normal Shedding vs Hair Loss in Cats

Shedding is a natural process that all cats go through. Cats shed old and damaged fur to make way for new growth, which keeps their coats healthy and clean. The amount of shedding can vary depending on the breed, age, and even the season. For instance, many cats shed more in the spring and autumn seasons. 

When hair loss exceeds normal shedding and becomes noticeable or excessive, it may be a sign of an underlying issue. Abnormal hair loss in cats can be patchy, symmetrical, or generalized, affecting specific areas or the entire body.

Some key signs that your cat's hair loss may be abnormal include:

  • Bald patches or thinning fur

  • Persistent scratching or grooming in specific areas

  • Red, inflamed, or scaly skin

  • Unexplained weight loss or changes in behavior

What Causes Hair Loss in Cats?

Common Causes of Hair Loss in Cats

Hair loss in cats can result from different causes and reasons. Alopecia in cats may appear suddenly or progress gradually, and recognizing the signs early can help ensure your cat gets the right care quickly. Here are some of the common causes of hair loss in cats:

Fleas and Parasites

Fleas are a leading cause of hair loss in cats. When a cat is bitten by a flea, it may experience intense itching and irritation. Other effects of flea infestation can include severe scratching, redness, and hair loss. In many cases, this may be due to a flea allergy, which causes a hypersensitive reaction in some cats.

On the other hand, parasites, such as mites or lice, can also cause similar symptoms in your cats. Regular flea prevention and parasite control are essential in preventing hair loss associated with these pests.

Allergies

Cats, like humans, can suffer from allergies. Common allergens include food, environmental factors such as pollen or dust mites, and certain materials like plastic or wool. Allergic reactions often manifest as itching, redness, and hair loss, particularly around the face, neck, and tail.

Food allergies are particularly challenging to diagnose, as they can develop at any stage of life. If you see any allergies in your cat’s skin, it may be time for a visit to our clinic.

Skin Infections

Skin infections are a common cause of hair loss in cats. Bacterial and fungal elements can cause infections in your cats, which can cause hair loss. Ringworm, a fungal infection, is one of the most common culprits. It causes circular patches of hair loss with red, scaly skin underneath. When this happens, our vets may prescribe medications to combat the infection and promote healing in your cat’s skin and coat.

Ringworm and mites can be contagious to other pets and even humans, so prompt diagnosis and treatment are essential. If your cat is showing signs of circular bald spots or intense itching, it’s best to isolate them and bring them in for an evaluation. Early action can protect your entire household.

Hormonal Imbalances

Hormonal disorders, such as hyperthyroidism or Cushing's disease, can cause hair loss in cats. These conditions often result in symmetrical hair loss, characterized by thinning of the hair on both sides of the body.

In addition to hair loss, cats with hormonal imbalances may also exhibit other signs such as weight loss, thirst, and changes in behavior and appetite. When this happens, blood tests and other diagnostic tools are necessary to identify and effectively treat these conditions accurately.y.

Stress and Anxiety

Cats can become stressed easily due to their lifestyles and environments. One of the significant physical symptoms includes hair loss. Everyday stressors include changes in the household, new pets, moving to a new home, changes to their routines, or even boredom.

Stress-related hair loss often occurs due to excessive grooming. In this condition, cats may groom themselves excessively, resulting in bald patches, particularly on the belly, flanks, and legs. This condition, known as psychogenic alopecia, is a behavioral disorder that results in compulsive grooming due to emotional distress. 

Nutritional Deficiencies

When cats don’t get enough nutrition, their skin and coat might take a hit. Cats that lack certain vitamins and minerals may experience hair loss and poor coat condition. Cats on low-quality diets or those with absorption issues may be more prone to nutritional deficiencies.

When this happens, it’s essential to discuss your cat’s meal plan with us so we can provide a simple nutritional plan that helps keep its coat shiny.

Genetic Factors

Some cats are predisposed to hair loss. Breeds like the Sphynx are naturally hairless, while others may have a genetic predisposition to certain skin conditions that lead to hair loss. If your cat's hair loss is due to genetic factors, it may not be preventable; however, managing the condition and keeping your cat comfortable are essential.

Age and Breed Factors in Cat Hair Loss

Not all cats are affected equally by hair loss. Hair loss in kittens is often caused by parasites, an underdeveloped immune system, or poor nutrition, especially if they were orphaned or weaned prematurely. On the other hand, senior cats may experience hair thinning due to hormonal imbalances or systemic illnesses, such as hyperthyroidism or kidney disease.

Certain breeds are also more prone to skin sensitivities. For example, Sphynx and Devon Rex cats naturally have minimal fur or unique coat types, which makes them more susceptible to environmental irritation or grooming-related hair loss. Knowing your cat’s breed and life stage can help us tailor the right care plan to meet their specific needs.

Cancer and Immune Disorders

Cancer can also be a rare cause of hair loss. However, this can also indicate a more serious underlying condition. These conditions can cause systemic symptoms, including hair loss, weight loss, and lethargy.

Worried about your cat's hair loss?

Worried about your cat's hair loss?

Book a consultation with our vets today.

Book a consultation with our vets today.

Diagnosing Hair Loss in Cats

When diagnosing the cause of your cat’s hair loss, we take several distinct approaches. This often involves the help of you and your cat’s documents. Alopecia in cats can stem from a wide range of health issues; therefore, our diagnostic steps are designed to explore both external and internal causes thoroughly. Here’s what we can do to diagnose hair loss in cats:

Medical History

Our vets will start by gathering a detailed medical history of your cat. This includes questions about diet, grooming habits, recent changes in the household, and any other symptoms you've noticed. Providing accurate information helps narrow down potential causes.

Physical Examination

A thorough physical examination allows our vets to determine the hair loss condition and its intensity. We may look for signs of parasites, skin infections, or other visible issues. In some cases, we may use a special lamp called a Wood's lamp to detect fungal infections, such as ringworm.

Diagnostic Tests

Depending on the initial findings, we may proceed with different steps to determine the cause of your cat’s hair loss.

  • Skin Scrapings

Our vets will comb your cat’s skin and check for mites, fungal infections, or bacterial overgrowth. Through skin scrapings, we can investigate the common external causes of hair loss in cats. Once we have a sample, we’ll use a microscope to determine the cause.

Skin scrapings are a vital diagnostic tool when investigating external causes of hair loss, such as parasites or infections. During this procedure, a small sample of your cat’s skin is gently scraped using a specialized tool. This sample is then examined under a microscope to check for mites, such as Demodex or Sarcoptes, which can cause mange. Additionally, the test can identify fungal infections, such as ringworm, or bacterial overgrowth, both of which are common causes of hair loss.

  • Blood Tests

Blood tests allow us to get a deeper view in case the cause might be internal. Hormonal imbalances, such as hyperthyroidism or Cushing’s disease, are often detected using blood tests. These tests can also help reveal nutritional deficiencies and the presence of infections in cats.

  • Allergy Testing

Allergies are common in cats, and we include allergy testing as part of our process. This helps pinpoint the allergens triggering your cat’s symptoms, such as itching, redness, and hair loss. Understanding what triggers these is helpful for us to create detailed treatment plans to manage your cat’s allergies.

  • Biopsy

Although it is rare, skin biopsy can also be used to diagnose more complex conditions like cancer or autoimmune diseases.  A biopsy can reveal structural changes in the skin, inflammatory responses, or abnormal cell growth, providing information that regular tests cannot provide.

Treatment for Hair Loss in Cats

Treatment Options for Hair Loss in Cats

Once we determine the cause of your cat’s hair loss, various treatment options will be available. This tailored approach is great for diving in and getting straight to treatment without any more distractions. Here are the common steps we take to treat your cat’s hair loss:

Parasite Control

If fleas or other parasites are causing hair loss in cats, we will recommend flea control products, medicated shampoos, or topical medications. These treatments should be regularly applied to help your cat's skin recover and let its hair grow properly. You'll also have to clean your home and your cat's living areas properly to prevent more issues.

Allergy Management

Different allergies have different management options. For food allergies, our pet allergists may need to consider removing certain foods from your cat’s diet. We’ll also consider the use of antihistamines, corticosteroids, or allergy shots. In some cases, hypoallergenic diets or special shampoos may be recommended.

Treating Infections

When dealing with skin infections caused by bacteria, we use antibacterial topical or oral medications. For ringworm, antifungal treatments are essential, and maintaining good hygiene is crucial to help prevent the spread of infection.

Hormonal Therapy

Hormonal imbalances require specific treatments tailored to the individual condition. For hyperthyroidism, medication, therapy, or surgery may be recommended. The most important step is to monitor your cat regularly and ensure the treatment is effective.

Stress Management

If stress or anxiety is the cause of hair loss, addressing the underlying stressor is key. This may involve changes in the environment, such as providing more enrichment and mental stimulation or using calming products like pheromone diffusers. In some cases, we may recommend behavioral therapy or anti-anxiety medications.

Nutritional Support

Improving your cat's diet can significantly impact coat health. Our veterinarians may recommend a balanced, high-quality diet rich in good fats, vitamins, and minerals to promote hair growth and reduce hair loss.

Specially formulated foods have good amounts of these essential nutrients. If you're looking to serve up some natural options for healthy fatty acids, fish like salmon and anchovies are great options. For Vitamins A and E, which promote coat health, liver and leafy greens are good treats.

Supportive Care for Genetic Conditions

For cats with genetic predispositions to hair loss, supportive care is essential. This may involve regular grooming, using gentle shampoos, and keeping the skin moisturized to prevent dryness and irritation. You can find all the products you'll need for your cat's skin and fur maintenance at our vet pharmacy.

Managing Serious Conditions

When hair loss is accompanied by a series of symptoms indicative of a severe condition, such as cancer or an immune disorder, treatment will focus on managing the underlying disease. This may involve surgery, chemotherapy, or immunosuppressive medications, depending on the diagnosis.

Preventing Hair Loss in Cats

Preventing hair loss in cats begins with a clean home and a dedicated cat owner. Here’s how you can prevent your cat from having excessive hair loss:

Groom Your Cat Regularly

Regular grooming helps remove loose fur, reduces shedding, and allows you to check for signs of parasites or skin issues. Professional grooming services can help keep your cat's skin and coat condition in check, including checking for hair loss. For long-haired breeds, daily brushing is recommended to prevent matting and tangles.

Prevent Fleas and Parasites

Consistent flea and parasite prevention is crucial in preventing hair loss caused by these pests. Use the flea treatments recommended by our clinic and keep your home clean to minimize the risk of infestations.

Provide a Diet for Coat Health

A good and healthy diet helps keep your cat’s skin and coat healthy. Start by giving protein-rich foods that also have a good amount of vitamins and minerals. High-quality cat food is a good start. Some cat foods specialize in helping maintain your cat’s fur.

To help you create a detailed nutritional plan, it’s important to discuss your cat’s meal plan with us. Your cat will need good amounts of Vitamins A and E, as well as Omega-3 and Omega-6 fatty acids to promote hair growth and coat health.

Reduce Stress at Home

Minimize stress in your cat's environment by providing a stable routine, plenty of enrichment, and safe spaces for retreat. If your cat tends to get stressed frequently, consider using pheromone products or ask us for tips on helping your cat feel more relaxed.

Visit the Vet Regularly

Vet checkups help us keep a good eye on your cat and determine any conditions that might affect its health. Annual checkups are essential, especially for older cats or those with pre-existing conditions. Hair loss in cats should always be monitored in case things get worse.

“When a cat starts losing fur, it’s more than just a skin issue. It’s a window into their overall health. Whether it’s stress, parasites, or something deeper, we owe it to them to listen early and act fast.”

- Dr. Soheyl Simaei

Conclusion

Cat hair loss can be a very concerning issue for both cats and their caretakers. You might be wondering, “why is my cat losing fur?” and the answer isn’t always straightforward. 

While some shedding is normal, excessive or abnormal hair loss often indicates an underlying problem that requires attention. When you have a complete understanding of your cat’s hair loss problem, vet care will be a breeze. Let’s take care of your cat’s glowing coat. If your cat is losing hair more than usual, don’t wait. Book a visit and let us help.

Frequently Asked Questions

How can I fix my cat's hair loss?

How can I fix my cat's hair loss?

How can I fix my cat's hair loss?

How can I fix my cat's hair loss?

What food causes hair loss in cats?

What food causes hair loss in cats?

What food causes hair loss in cats?

What food causes hair loss in cats?

What deficiency causes hair loss in cats?

What deficiency causes hair loss in cats?

What deficiency causes hair loss in cats?

What deficiency causes hair loss in cats?

Is hair loss in cats contagious?

Is hair loss in cats contagious?

Is hair loss in cats contagious?

Is hair loss in cats contagious?

Will my cat's fur grow back?

Will my cat's fur grow back?

Will my cat's fur grow back?

Will my cat's fur grow back?

Share

Custom Icon

Subscribe to Our Newsletter

Sign up for weekly pet health tips and insights from our veterinarians.

Sign up for weekly pet health tips and insights from our veterinarians.

Wellness & Emergency Care

Book Appointment

Book Appointment

Worried about your pet?

We’re here for urgent care, wellness checks, or anything in between. 

We’re here for urgent care, wellness checks, or anything in between. 

Get the best Vet care for your pet
Get the best Vet care for your pet
Get the best Vet care for your pet

Unique care for your best friends, because they’re family.

© 2025 Noble Veterinary Clinics

Unique care for your best friends, because they’re family.

Policies

Contact Us

DIP - 8am to 9pm
JLT - 10am to 7pm

Jumeirah -

Mon-Fri: 8am to 8pm

Sat-Sun: 9am to 6pm

© 2025 Noble Veterinary Clinics

© 2025 Noble Veterinary Clinics