Hot Spots in Dogs (Acute Moist Dermatitis)
- Herb Rovay
- Mar 10
- 3 min read
Understanding Sudden Skin Infections in Dogs
Hot spots, also called acute moist dermatitis, are a common and painful skin condition in dogs. They appear as rapidly developing areas of red, inflamed, and often moist skin.
Hot spots can develop very quickly, sometimes within a few hours. Dogs often lick, chew, or scratch the area intensely, which worsens the irritation and spreads the infection.
Although hot spots may look alarming, they usually respond well to treatment when addressed early.
What Causes Hot Spots?
Hot spots occur when something irritates the skin and causes a dog to lick or scratch excessively. The constant moisture and trauma damage the skin barrier, allowing bacteria that normally live on the skin to multiply rapidly.
Common triggers include:
flea infestations
allergies (environmental or food)
ear infections
skin parasites
insect bites
small wounds or skin irritation
Once the dog begins licking or scratching, the condition can worsen quickly.
Why Hot Spots Spread So Quickly
Dogs often lick or chew the irritated skin repeatedly. This trauma causes inflammation and breaks down the protective skin barrier.
Moisture from saliva, combined with bacteria on the skin surface, creates an environment where infection develops rapidly.
The result is a painful, inflamed area that may grow larger within a short period of time.
Signs of Hot Spots in Dogs
Hot spots often appear suddenly and can become severe very quickly.
Common signs include:
red, inflamed skin
moist or oozing patches
hair loss around the lesion
intense licking or chewing
pain when the area is touched
a foul or infected smell
Hot spots most often develop on the:
neck
hips
chest
head
base of the tail
Dogs Most at Risk
Some dogs are more likely to develop hot spots.
Dogs with thick coats or dense fur are particularly prone to this condition because moisture can become trapped against the skin.
Breeds commonly affected include:
Golden Retrievers
Labrador Retrievers
German Shepherds
Saint Bernards
Rottweilers
Dogs with underlying allergies or flea problems are also more likely to develop recurrent hot spots.
Why Veterinary Treatment Is Important
Hot spots are painful and rarely resolve on their own. Without treatment, the infection can worsen and spread to surrounding skin.
Veterinary treatment focuses on:
clipping hair around the affected area
cleaning the infected skin
controlling the bacterial infection
relieving itching and inflammation
identifying the underlying cause
Treating the underlying trigger is essential to prevent the hot spot from returning.
Treatment for Hot Spots
Treatment depends on the severity of the infection.
Your veterinarian may recommend:
topical antiseptic treatments
medicated sprays or creams
antibiotics if infection is severe
medications to reduce itching and inflammation
flea control if parasites are present
Most hot spots improve quickly once the infection and irritation are properly treated.
Preventing Hot Spots
Prevention involves managing the underlying factors that cause skin irritation.
Helpful preventive measures include:
maintaining consistent flea prevention
managing allergies effectively
treating ear infections promptly
regular grooming and coat care
keeping the skin clean and dry
Addressing itching early can prevent hot spots from developing.
Hot Spot Treatment in Kalamunda
If your dog develops a red, irritated, or moist patch of skin and begins licking the area constantly, it may be a hot spot.
The team at Hilltop Veterinary Hospital in Kalamunda can diagnose the cause of the irritation and provide treatment to relieve your dog’s discomfort and prevent the infection from worsening.
Concerned About Your Dog’s Skin?
If your dog is licking, scratching, or has developed a red inflamed patch of skin, book a consultation with Hilltop Veterinary Hospital so our veterinary team can examine the skin and recommend the appropriate treatment.
Explore More Pet Health Advice
For more veterinary advice on skin disease, parasites, and preventive care, explore our Pet Health Advice library.
You can also browse our Dog Health Care articles to learn more about allergies, flea control, ear infections, and other common skin conditions.
The information provided in this article is intended for general educational purposes only and should not replace professional veterinary advice. Every dog’s medical situation is unique. If your dog shows signs of skin infection, irritation, or persistent itching, consult your veterinarian for proper diagnosis and treatment.
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