My German Shepherd suffered from hot spots. I was constantly shaving the areas, washing with disinfectant and applying solutions.
Then I heard about using black tea in a way that made the shaving, washing and applying anything else completely unecessary. It had the added benefit of reducing the number of hot spots until he was completely free of them.
It is very important to follow this exactly. Boil about two cups of water and add 10 black tea bags. As it steeps gently squeeze the bags with a spoon. Allow it to cool to until it's just SLIGHTLY warm to the touch and then pour it generously over the affected area so that it soaks through the hairs.
I have no idea why but this brew of tea becomes ineffective if it's too warm or after it cools completely, so if you have any left over just throw it out. Each application has to be made fresh.
It provides immediate relief for your dog, heals rapidly, no discomfort, no exposed bald spot to grow in, and it's cheap and easy to do.
The sooner you begin to treat the hot spot the faster it will heal, so even if you just suspect a hot spot treat it right away. It's cheap and does no harm even if you end up treating a simple itch.
At first you may have to repeat this twice a day for a few days but with any subsequent hot spots it works faster. My dog's hot spots began to dwindle until he was free of getting them completely.