Hot Spots in Dogs: Welfare and Prevention
What Are Hot Spots?
Hot spots (acute moist dermatitis, pyotraumatic dermatitis) are areas of rapidly developing, intensely inflamed, painful, exudative skin lesions caused by self-trauma (scratching, licking, biting). They develop within hours, typically triggered by an itch (flea bite, allergy, ear infection, anal gland impaction, local skin irritation) or behavioural factors (boredom, anxiety). They are most common in thick-coated, heavy-coated breeds (Golden Retrievers, St Bernards, Labradors) and in hot, humid conditions.
Welfare Impact
Hot spots cause acute, intense welfare harm. Affected dogs are in significant pain and distress: they cannot stop self-traumatising the area, rapidly enlarging the lesion. The combination of pain, itching, and compulsive self-trauma creates a welfare cycle that worsens rapidly without intervention. Lesions are frequently found under mats of hair (damp conditions promoting bacterial overgrowth); delayed detection allows significant tissue damage to accumulate.
Immediate Treatment
Treatment: gentle clipping of all hair from and around the lesion (essential — most hot spots are much larger than the apparent surface lesion once hair is removed); gentle cleaning with dilute antiseptic (chlorhexidine); topical antibacterial/anti-inflammatory preparations (chlorhexidine/miconazole spray, hydrocortisone/acetic acid spray); systemic antibiotics if infection is deep or spreading; corticosteroids (oral or injectable) provide rapid relief from pruritus; and Elizabethan collar to prevent further self-trauma. Pain management (NSAIDs) for severe lesions.
Identifying Underlying Triggers
Single hot spots may resolve without recurrence; recurrent hot spots indicate an unresolved underlying trigger requiring investigation. Common triggers: flea allergy dermatitis (FAD — most common; rigorous flea control is essential); atopic dermatitis; food allergy; otitis externa; anal gland disease; musculoskeletal pain (dogs lick painful joints); and anxiety or boredom. Addressing the underlying trigger prevents recurrence and long-term welfare improvement.
Prevention Through Coat Management and Parasite Control
Regular grooming (particularly in thick-coated breeds) removes matted hair that traps moisture. Keeping coats shorter in summer reduces hot spot risk. Veterinarian-recommended flea prevention should be applied year-round in high-risk dogs. Regular bathing and drying (particularly after swimming) reduces moisture accumulation. Dogs prone to hot spots benefit from annual veterinary dermatological assessment to identify underlying allergic disease and implement long-term management.