And that's not too far from the truth. At first, all you notice is the dog licking at an area. Then, within 24 hours, hair can fall out and a moist area of skin appears. There can be a foul odor associated with these skin areas.
Hot spots have nothing to do with the temperature outside.
They are not caused by a sunburn. A hot spot is actually a skin infection which is located on the surface of the skin. It spreads rapidly and is very irritating. There are a few different causes of hot spots. They can appear after two dogs have been aggressively playing and biting each other.