Circulating air isn't able to reach the skin. Regular grooming and bathing helps avoid these problems. If your Chow's coat isn't especially thick in the summer, you may be able to skip the blowdrying process after the bath. Chows with heavy undercoats and puppies still in puppy coat need to be blowdried because the coat will take forever to dry on its own and retains moisture, often causing hot spots, especially in humid weather. They can appear overnight, growing from a tiny spot into a huge, hot, angry, oozing sore.
Chows are their own worst enemies when it comes to hot spots.
What exactly causes hot spots isn't known for sure but many things contribute to them. Soap left in the coat after the bath is a leading culprit along with flea infestations, wounds, allergies and hormone disorders. If your Chow breaks out shortly after a bath, you can suspect you didn't rinse him well enough. Another bath with a more thorough rinsing will be necessary. A Chow that's allergic to fleas will fly into a coat-chewing frenzy over just one flea bite.