What Causes Hot Spots in Dogs?

"Hot spot" is the common term for acute moist dermatitis---a hairless, intensely itchy patch that a dog will not leave alone. Because of the constant scratching or chewing to relieve the itch, the skin is often red and inflamed. Hot spots can happen to dogs of any breed or age.

Flea Bites

Flea bites are a common reason for hot spots in dogs, usually due to the irritating nature of flea saliva.

Ear Shape

According to Dog Owner's Home Veterinary Handbook, dogs with hairy, floppy ears get hot spots on the ear flaps. Golden Retrievers and Newfoundlands are prone to this kind of hot spot.

Poor Grooming or Neglect

Dogs rescued from puppy mills or hoarders often have hot spots due to not being groomed in their lives. The ASPCA claims that poor grooming is a very common hot spot cause.

Allergies

Allergies are common causes. These can be allergies to anything from a certain kind of food, to pollen or even the laundry detergent used in their bedding. Skin scraping tests can help identify the allergen.

Anal Gland Problems

If the hot spots are under the dog's tail, it could be due to an impaction or infection of the anal gland. Serious cases could require surgery.

Resources

• Dog Owner's Home Veterinary Handbook
• Hot Spots: Acute Moist Dermatitis in Dogs
• ASPCA: Hot Spots