Hot spots are also known as pyotraumatic dermatitis or superficial pyoderma. Those tongue-twisters are just scientific labels for inflamed, infected skin.
How Hot Spots Develop Hot spots are created when your dog's natural bacteria overpopulates parts of his skin. When an infection arises from a dog's own bacteria, there is almost always a root cause. Hot spots often occur in dogs with underperforming immune systems.
Hot spots can come on very quickly. You might leave your perfectly healthy pup one morning to go to work, and by the time you return home that evening, she's completely preoccupied with an area of skin that is irritated, inflamed and oozing. Hot spots can be very painful for your dog and quite sensitive to the touch.
Any dog can develop hot spots, but they're much more common in dogs with thick coats, dirty and/or moist skin, and dogs with allergies, including fleas.
Let's say your dog jumps into a pond of dirty water on a hot, humid summer day, then gets out and lays in the grass under a tree for a nap.
This activity has created a dirty, damp, warm, very hospitable environment for your dog's natural skin bacteria to overgrow. It's a set-up for a potential full body allergic reaction, including multiple hot spots, on your pet's skin.
If your canine companion develops a hot spot, you'll need to do two things: