Hot spots in dogs — medically known as acute moist dermatitis — are one of the most common and uncomfortable skin conditions that affect our canine companions. These angry, red, weeping patches of skin can appear seemingly overnight and spread rapidly if not treated promptly. If your dog has ever been plagued by incessant licking, chewing, or scratching at a particular spot, you’ve likely witnessed a hot spot in the making.
Understanding what causes hot spots, how to treat them effectively, and how to stop them from recurring is essential knowledge for every dog owner. This guide covers everything you need to know about hot spots in dogs for 2026.
What Are Hot Spots in Dogs?
Hot spots are localized areas of inflamed, infected skin that result from a dog’s repeated licking, chewing, or scratching at one spot. The moisture trapped against the skin from saliva creates a perfect breeding ground for bacteria — most commonly Staphylococcus pseudintermedius or Pseudomonas — which then multiply rapidly and cause a superficial skin infection.
The lesions are characteristically moist, red, ulcerated, and often oozing. They can grow from a small coin-sized area to a palm-sized wound within hours. Hot spots are painful and intensely itchy, creating a destructive cycle where the dog licks the area more, making it worse. Hair loss over the affected patch is almost always present, and you may notice a foul odor coming from the wound.
Hot spots can appear anywhere on the body, but are most commonly found on the head, neck, hips, and limbs. Dogs with thick, dense coats — such as Golden Retrievers, Labrador Retrievers, German Shepherds, and St. Bernards — are particularly prone because moisture gets trapped easily beneath the fur.
What Causes Hot Spots in Dogs?
Hot spots don’t appear out of nowhere — they’re always triggered by an underlying itch or irritation that causes the dog to self-traumatize the skin. Common underlying causes include:
Allergies: Environmental allergies (atopy), food allergies, and flea allergy dermatitis are among the most frequent culprits. An allergic dog that is constantly itchy is much more likely to develop hot spots than a non-allergic dog.
Flea infestation: Even a single flea bite can trigger a massive allergic reaction in a flea-allergic dog, leading to intense scratching and chewing that starts a hot spot.
Poor grooming or matted fur: Matted coats trap moisture and debris against the skin, creating the perfect environment for bacteria. Dogs that aren’t groomed regularly — especially after swimming or bathing — are at increased risk.
Ear infections or anal gland issues: Dogs that scratch excessively around their ears or scoot due to anal gland discomfort can develop hot spots in those areas.
Boredom, stress, or anxiety: Behavioral causes of excessive licking can also initiate hot spots. Dogs that are under-stimulated or anxious may chew on themselves repetitively.
Orthopedic pain: A dog that licks constantly at a hip or joint may be experiencing underlying pain from arthritis or hip dysplasia. This can be mistaken for a behavioral issue when it’s actually medical.
Wet conditions: Swimming, rain, or even humid weather can leave moisture trapped in a dog’s coat, increasing the risk, especially in summer months.
How to Treat Hot Spots in Dogs
Hot spots require prompt treatment to break the itch-scratch cycle and clear the bacterial infection. Here’s what treatment typically involves:
Clip the fur around the hot spot: This is a critical first step that allows the area to dry out and permits topical treatments to reach the skin. Use clippers (not scissors, to avoid accidentally cutting the skin) to clear a margin of healthy skin around the lesion. This step is best done by a veterinarian or groomer, as the area is very painful.
Cleanse the wound: Gently clean the hot spot with a mild antiseptic solution such as diluted chlorhexidine or a veterinary wound wash. Pat dry carefully.
Topical treatments: Your vet may prescribe a topical antibiotic/steroid spray or cream to reduce infection and inflammation. Over-the-counter hydrocortisone sprays can provide short-term relief but aren’t a substitute for veterinary-prescribed medication in severe cases.
Prevent licking: An Elizabethan collar (cone) is often necessary to stop the dog from reaching and re-traumatizing the hot spot. Some dogs also do well with a comfortable recovery suit or inflatable collar.
Oral medications: For moderate to severe hot spots, or when the infection has spread deeply, your veterinarian will likely prescribe oral antibiotics (typically a 2–3 week course) and may also prescribe oral corticosteroids to relieve the itch and inflammation rapidly.
Addressing the underlying cause: Treating the hot spot itself is only half the battle. If allergies, fleas, or ear infections are not addressed, hot spots will recur. Your vet should perform a thorough workup to identify and treat the root cause.
When to See a Veterinarian
While mild, small hot spots can sometimes be managed at home initially, it’s always wise to have a vet evaluate the problem — particularly if:
- The hot spot is larger than a 50-cent piece or growing rapidly
- Your dog is in obvious pain or won’t let you near the area
- The lesion is deep, heavily crusted, or has a strong odor
- Your dog has a history of recurring hot spots
- There are multiple hot spots appearing simultaneously
- The area becomes swollen or warm to the touch, suggesting a deeper infection (furunculosis)
A vet visit is particularly important because some conditions — such as ringworm, mange, or deep bacterial infections — can mimic hot spots and require completely different treatment approaches. Self-treating the wrong condition can make things significantly worse.
How to Prevent Hot Spots in Dogs
Prevention is far more comfortable for your dog than treatment. Several strategies can significantly reduce the frequency of hot spot episodes:
Control fleas year-round: Use a veterinarian-recommended flea preventative consistently, even in winter months. A single flea on a flea-allergic dog can spark a severe reaction.
Regular grooming: Brush your dog’s coat frequently to prevent mats and improve airflow to the skin. Dogs with dense coats may benefit from professional grooming that includes thinning out the undercoat in warm months.
Dry your dog thoroughly after swimming or bathing: Use a towel and, if your dog tolerates it, a low-heat hair dryer to make sure no moisture is trapped under the coat.
Manage allergies proactively: Work with your vet to identify and control allergens. This may involve allergy testing, immunotherapy, prescription medications (such as Apoquel or Cytopoint), or a hypoallergenic diet trial.
Keep your dog mentally stimulated: Reduce boredom and anxiety-related licking by providing puzzle toys, regular exercise, and adequate mental enrichment.
Regular vet checkups: Routine veterinary exams allow early detection of ear infections, anal gland problems, and other issues that can predispose your dog to hot spots.
Can I treat a hot spot on my dog at home?
Small, early-stage hot spots can sometimes be managed at home by carefully clipping the hair around the area, cleaning it with antiseptic, applying a topical antibiotic spray, and using a cone to prevent further licking. However, if the hot spot is large, spreading quickly, deeply infected, or if your dog is in significant pain, a veterinarian visit is essential. Oral antibiotics are often needed and are only available by prescription.
How long does it take for a hot spot to heal?
With proper treatment, most hot spots begin to show improvement within 3–5 days and heal completely within 2–3 weeks. The key is preventing the dog from licking the area (using a cone or recovery suit) and completing the full course of antibiotics if prescribed. Without treatment or if the dog continues to traumatize the area, hot spots can persist and worsen for weeks.
Why does my dog keep getting hot spots?
Recurring hot spots almost always point to an underlying condition that hasn’t been fully addressed. Common culprits include uncontrolled allergies (food or environmental), flea allergy dermatitis, chronic ear infections, anal gland problems, or orthopedic pain. Work with your veterinarian to identify and manage the root cause — treating only the hot spot without addressing the trigger will result in the cycle repeating.
Are hot spots contagious to other dogs or humans?
Hot spots themselves are not contagious. The bacterial infection that causes them (most commonly Staphylococcus pseudintermedius) is a normal skin bacterium that becomes problematic only when the skin is damaged by self-trauma. However, if the underlying cause is fleas or a contagious skin condition like ringworm (which can mimic a hot spot), those can spread to other animals and sometimes people. Always have your vet confirm the diagnosis.
Do hot spots hurt dogs?
Yes, hot spots are both painful and intensely itchy. The combination of inflammation, broken skin, and bacterial infection makes the affected area very sensitive. Many dogs will react strongly — even snapping or growling — when the area is touched. This pain response is an important reason to seek veterinary care promptly, as proper pain management and treatment will make your dog much more comfortable during the healing process.