My dog is very allergic to something and is starting to become scared of me

Are you feeding an allergen free food? Start there and give him nothing else. Also cut out use of perfumes in laundry detergent and use around the house until you get this figured out. The vet should be able to give you a steroid that will GREATLY reduce the itching and irritation. It's not a forever solution but should help you get it under control. You can give a daily oral allergy pill that will help produce less histamine.

How long has this been going on? Go back to when it started. .. did anything change? Did you change where the dog sleeps or eats? Did you start walking at a new place? Did you start using something different on your lawn or carpet? Did you get new carpet? Did you get a new car that he rides in? Did you change your laundry detergent, purfume, shampoo? Does someone new live in the house?

Poor puppy! I am not a vet, but if this were a human, the first thing I'd do is to put your poor dog on a tapering dose of prednisone (dirt cheap and will help). I would also start a limited course of a topical steroid in the worst places - if he licks, probably a gel (though they tend to be expensive). Benadryl is helpful. If you want to decrease his drowsiness (but why at the moment? He'll just scratch and suffer.) you can use a second generation antihistamine (more costly).

As a dog owner, I would have the dog treated for mange/scabies regardless of if the vet thought the dog had it or not. A dog with mange is constantly scratching, losing hair, and is miserable. If you've ever had scabies (I have), you wouldn't wish it on your worst enemy. It's not a cleanliness issue, it's a thing a dog can contract from any place another dog with mange has recently been. And it does not go away unless treated specifically.

Some allergies in dogs are due to food. An elimination diet isn't pleasant, but it would help a lot if this is food related. An elimination diet usually starts with just rice (no proteins, no preservatives, no additives), then you add things one at a time (especially careful when introducing protein) and you might as well try to avoid gluten, though allergies to this aren't common. Your vet should be able to give you an elimination diet.

Washing laundry with a low allergy detergent and double-rinsing might help.

Watch for infection. Have his nails short and rounded off. It won't help the itching, but it will decrease the damage he can do with them.

Dry skin is the leading cause of itching in humans and in dogs. In his furry areas, look for dandruff. It it's there, running a humidifier, washing him with a hypoallergenic, mild soap or shampoo (I would use handmade soap, which is easy to buy on the Internet), that is all or mostly olive-oil, no coconut oil - also called sodium cocoate on soap labels - and following it up with a hypoallergenic moisturizer can help a lot. Pat dry, don't rub, with a clean towel each time. So can giving him omega-3-fatty acids and a good-quality probiotic. If he's nervous when you handle him, do it after a dose of benadryl, or even a short-acting benzodiazepam.

Finally (and here I leave dogs behind) the vet should be looking for disease. Bloodwork at a minimum. I would think about a punch biopsy, but that might be going too far. Also, when a doctor can't figure out what's going on in a patient, they refer them to specialists. If you're going to throw money at a vet, see a different one! A veterinary dermatologist sounds like a decent choice.

Good luck with your pup. (Oh, and here's a pretty good article from PetMD.)

My recommendation would be to put your dog on hypoallergenic diet. One source of knowledge you may find here: hypoallergenic pet diet . It written for cats but it is the same with dogs. I know because I used to solve similar problem and this article was pretty helpful.

It had turned out to be the new detergent that I had bought. I went back to the non-perfumed original detergent and washed everything and his symptoms got better almost overnight.