Pyotraumatic dermatitis, also known as hot spots, is a common skin condition in pets that can cause a lot of discomfort and distress.
It's a self-inflicted skin injury that can quickly become a serious issue if not addressed promptly.
The condition often starts with a small, localized skin irritation, which the pet then scratches or bites, making it worse.
This can lead to a vicious cycle of scratching, biting, and licking, which further exacerbates the problem.
Some pets may be more prone to pyotraumatic dermatitis due to their genetic makeup or underlying health conditions.
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What is Pyotraumatic Dermatitis?
Pyotraumatic dermatitis, also known as hot spots, is a painful skin condition for dogs.
It's characterized by redness and skin irritation, often accompanied by hair loss.
Hot spots are self-inflicted by your dog, created when they compulsively chew at a certain part of their body.
This behavior is painful for your pup and can lead to secondary skin infections.
If you suspect your dog has a hot spot, it's essential to take action to prevent further irritation and infection.
What Causes?
Pyotraumatic dermatitis is a skin condition caused by self-inflicted trauma to the skin, often incited by pain or irritation. This can be due to flea infestations, which are the most common inciting factor, or other irritants like clippers or foreign bodies in the coat.
The condition can also be triggered by skin maceration from repeated wetting of the coat or moisture in the fur. This makes sense, as I've seen dogs with thick undercoats or long fur be more prone to this condition.
Dogs that live in hot and humid environments are more likely to develop pyotraumatic dermatitis. This is because the warm and moist conditions create an ideal breeding ground for bacteria to grow. Some breeds, such as the Airedale Terrier and Labrador Retriever, are more commonly affected by this condition.
The affected skin weeps serum, which can become colonized by bacteria, leading to further irritation. The area can become painful, as nerve endings are exposed when the surface of the skin is eroded.
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Here are some common causes of pyotraumatic dermatitis:
- Flea infestations
- Clippers or foreign bodies in the coat
- Skin maceration from repeated wetting of the coat or moisture in the fur
- Hot and humid environments
- Thick undercoats or long fur
It's essential to identify the underlying cause of pyotraumatic dermatitis to treat the condition effectively. By understanding the causes, you can take steps to prevent the condition from occurring in the first place.
Diagnosis
Diagnosis of pyotraumatic dermatitis involves confirming the presence of characteristic lesions and ruling out other common causes of folliculitis. This can be done through a combination of clinical signs, bacterial culture, and other diagnostic tests.
Skin cytology is a valuable tool for diagnosing pyotraumatic dermatitis, allowing the identification of inflammatory cells and bacteria. It can also help identify Malassezia dermatitis, a common coinfection.
To collect skin cytology samples, different techniques can be used depending on the type and location of the lesion. Impression smears are used for pustules or papules, while clear adhesive tape can be used for dry, oily, or hard-to-reach lesions.
In cases of recurrent pyoderma, bacterial culture and susceptibility testing are essential for selecting systemic antimicrobial therapy. This is because resistant infections are more common in these cases.
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The most common underlying triggers of superficial pyoderma include allergies, endocrinopathies, keratinization disorders, follicular dysplasias, ectoparasites, and poor grooming.
Here are some common underlying triggers of superficial pyoderma:
- allergies (atopic dermatitis, food and flea bite allergy)
- endocrinopathies (hypothyroidism, hyperadrenocorticism)
- keratinization disorders
- follicular dysplasias
- ectoparasites
- poor grooming
Differential diagnosis may be difficult in some cases, but can be ruled out through histopathological examination. This can help distinguish between pyotraumatic dermatitis and other conditions such as demodicosis, dermatophytosis, superficial pyotraumatic folliculitis and furunculosis.
Treatment and Management
Treatment for pyotraumatic dermatitis typically involves breaking the "itch-scratch" cycle by clipping the fur and cleaning the skin. This is done by clipping the hair in and around the affected area, and then cleaning the skin with an antiseptic, rinsing, and drying.
Your veterinarian may also prescribe medications to relieve your dog's discomfort, such as steroid medications. These can be administered orally or injected, and can provide quick relief from itching and discomfort.
To help your dog's hot spot heal, your veterinarian may recommend clipping the hair around the spot, rather than the hot spot itself. This will prevent matted fur and excessive moisture from building up and causing further problems.
Apply a topical treatment to the affected area, such as antibacterial, anti-inflammatory, or steroid-containing creams or ointments. Your veterinarian will be able to prescribe the best treatment for your pet.
Here are some common treatments used to manage pyotraumatic dermatitis:
- Clipping the area under general anesthesia or sedation
- Cleaning with chlorhexidine shampoo
- Applying topical therapy, such as Hamamelis solution or Dermacool
- Using glucocorticoids, either topically or systemically
- Antibacterial therapy, if a secondary bacterial infection is present
In some cases, your veterinarian may also recommend using an Elizabethan collar to prevent further self-trauma. Additionally, sedation may be necessary short-term to help your dog relax and reduce stress.
Veterinary Care
Veterinary Care is a crucial step in treating pyotraumatic dermatitis. Your veterinarian will likely prescribe topical therapy, such as clipping the area, using sprays or creams to treat infection and itching, and Elizabethan collars or other barriers to prevent licking, chewing, and scratching.
Oral or injectable corticosteroids may also be prescribed to ease itching and discomfort, and antibiotics to address any underlying infection. Your vet will choose the best medication for your pet, even if it's not FDA-approved for use in animals.
Your veterinarian will also look for underlying causes of your dog's hot spot, such as flea infestations, allergies, or chronic ear, anal gland, or skin fold infections, and recommend treatment for those as well. This is essential to prevent recurring hot spots.
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When to Call Your Vet
If your pet's hot spot isn't improving after two days of treatment, it's time to call your vet.
Your vet should take another look to determine what's really going on, as hotspots can mimic other skin conditions like mites.
If the hot spot improves and then gets worse, it's also a good idea to call your vet.
They may prescribe oral steroids or other anti-itching medication and oral antibiotics to help clear up the issue.
Treating the hot spot alone isn't enough, so be sure to talk to your vet to determine what caused the hot spot and what steps to take to address the issue.
Here are some key signs that you should call your vet:
- Your dog doesn’t seem any better and is still itchy after two days of hot spot treatment
- The hot spot improves and then it gets worse
Vet Treatment
Veterinary treatment is a crucial step in helping your dog recover from hot spots. Your veterinarian may prescribe oral or injectable corticosteroids to ease itching and discomfort.
Your vet will also look for an underlying cause for your dog's hot spot and recommend appropriate treatment for that as well. This could include addressing flea infestations, allergies, behavioral issues, or chronic ear, anal gland, or skin fold infections.
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Topical therapy will be similar to what you may have already tried, consisting of clipping the area, using sprays or creams to treat infection and itching, and Elizabethan collars or other barriers to prevent licking, chewing, and scratching.
In addition to topical therapy, your veterinarian may prescribe antibiotics to treat any underlying skin infection. Common choices include cephalexin and amoxicillin-clavulanic acid.
Here are some common medications your vet may prescribe:
It's essential to work with your veterinarian to determine the best course of treatment for your dog's hot spot. They will help you break the "itch-scratch" cycle and address any underlying painful or itchy conditions.
Sources
- "Chapter 1: Pruritic dermatoses. Pyotraumatic dermatitis" (google.com)
- "Chapter 18 Dermatologic disorders. Pyotraumatic dermatitis" (google.com)
- "Chapter 3. Bacterial skin diseases. Pyotraumatic dermatitis" (google.com)
- Dog Hot Spot Treatment (banixx.com)
- Pyoderma in Dogs and Cats - Integumentary System (merckvetmanual.com)
- Skin fold infections (petmd.com)
- Flea bite hypersensitivity (petmd.com)
- Pyotraumatic dermatitis (acute moist dermatitis, hot spot) (veterinary-practice.com)
- Hot spots (wet eczema, pyotraumatic dermatitis) (stortvet.com)
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