You can't cure your dog of a skin allergy, also known as atopic dermatitis, but it is possible to take steps to avoid the effects of the disease bothering him. The itching and scratching that accompanies a skin allergy only occur when the allergens trigger a reaction. It is possible to create an environment around your dog that will avoid the majority of allergens that cause the dog to itch.
Dog allergies only make themselves known when enough allergens are allowed to build up that crosses the threshold level that the dog's body can withstand. When that happens the itching starts. The key is to minimize the allergens so that the threshold is not passed.
It may be that during spring when grasses begin to flower the or when the grass has just been mowed that the allergens are most active. Keeping the dog indoors for longer periods of time might be an option that could bring relief or, if that's not an option, putting booties or a T-shirt on a severely allergic dog when they go outdoors may be the answer.
Regularly washing during these high allergen periods will become necessary. Similarly it may be necessary to vacuum or shampoo the carpet more frequently to remove the proteins that live in the carpet fibers.
You dog's bedding will have to be changed and cleaned much more frequently to reduce the level of allergens that build up on it. The most common form of allergen will be the dust mite and frequent washing will greatly reduce the level of dust mites.
The dog will probably become sicker of the next suggestion than you will but it will be necessary to keep your dog clean. Frequent baths will be necessary and the dog should be washed with a hypoallergenic shampoo and conditioner.
Fleas and ticks are another source of allergen and vigilance is required to keep both off your allergic dog. It could only take a single flea to trigger an allergic reaction and this reaction will continue even after the flea has been removed.
Airborne allergens must be taken care of too which means that air filters should be changed regularly in your heaters and air conditioners. Although the filters trap the allergens, leaving them in place for too long runs the risk of allowing them to circulate back into the air. A recommended step to take is to attach a high-efficiency particle-arresting (HEPA) filter to your central air conditioning system and this will help both people and pets with allergies.
It will help if everyone in the household is mindful of the fact that you've got an allergic dog and they are alert to look for possible triggers. By practicing these avoidance techniques you will be giving your dog a much better chance of having its allergies controlled and will stand a good chance of living a comfortable life.