Dog rashes are a reaction to environment, or food and even fleas and ticks.
Rashes can develop quickly and without warning.
Dogs can be sensitive to things that are used indoors (cleaning solutions) or outdoors (pesticide) or to ticks and fleas.
There are a few broad categories that skin problems fall into: Allergies, Environmental, Infectious and Parasitic.
Most of these skin problems have something in common, and that is itchy skin, and rashes.
Your dog's skin and coat indicates the quality of its general health.
It is important to remember that once skin rashes occur, they become persistent and will require patient treatment to free your pet from it.
This should keep an owner on his toes when it comes to dog skin problems.
You and your pet may find the rashes obnoxious, but there are treatments for rashes.
First you need to find out if your dog is suffering from rashes or some other skin/coat problem.
The symptoms for dog rashes are:

1. Your dog's skin may look swollen, flaky or red.
   
2. The dog may either be nibbling on his skin with his teeth or using his paws to scratch it.
   
3. The rash may pop up anytime, and may not be followed by any other disturbing symptom.
   
4. If your dog is allergic to the dog food, an itchy skin may also cause rashes.
   
5. Your dog may have a recurring dog infection.
   
6. Your dog may suffer from hair loss
7. It may scratch profusely
8. There may be hot spots on the dog's skin.
   
9. Increase in the number of times your dog may want to go out to clear his bowel.
   

The reason for dog rashes: Dog rashes can be caused by an allergic condition called atopy, dog food, or parasites like worms, lice, ticks, and fleas.
Home remedies for treating dog rashes You can give your dog some instant (can be temporary) relief by using these remedies:

1. Dab cotton soaked in coconut oil on the dog rashes.
   Leave it on for few hours and wash it off with a shampoo.
   
2. One of the best natural and effective remedy is applying aloe vera on the dog's skin.
   You can apply it either directly from the plant or as available in the market.
   
3. Milk of Magnesia or magnesium hydroxide: You can apply a little amount of this liquid on your dog's rashes.
   
4. Mix some baking soda in water and apply it on your dog's skin for quick relief.
   

The remedies mentioned above are an alternative to traditional medical treatment.
It will be very wise on the part of the owner to incorporate some alternative treatment along with the conservative vet care in order to manage dog skin problems.