Dog scabs are the skin's response to irritation and itch. There are several factors that cause dog scabs to develop. The reasons for skin problems are as varied as their appearance, from nutritional problems to environment and from surface contact to diseases.

Dogs with skin problems can display a huge array of symptoms: constant licking, hair loss, constant chewing at an irritated spot, inflammation, pain and swelling.

When you see your dog incessantly scratching, you will often find red, itchy bumps and scabs on his skin. Dog scabs generally occur because of skin infection caused by dog food, the environment, certain substances in the house like air fresheners, fabrics and carpets, cleaning detergents and softeners, and plants. Parasites like mites and fleas and allergies are also responsible for dog scabs.

When it comes to allergy in your dog, it will be difficult to point out the exact cause. You and your veterinarian may have to resort to a trial and error method to find out the exact cause. Maintaining a record of all events that led to some problem in the dog can be helpful. Your dog can suddenly be allergic to his perfume, shampoos and conditioners along with other substances mentioned above.