That poor baby. You gotta fix this.
I’d be looking really hard for parasites, like fleas or mites, fungal issues with the skin, external toxins like chemicals used on the carpet or lawn and also looking at food issues.
I’d also be looking very hard at changes to food, housing or outside exposures that happened when the issue started.
Also, investigate plants your dog might be exposed to. I had a dog years ago who kept chewing her feet (yes, saw the vet many times about it), YEARS later I learned that Wandering Jew plants are very toxic to dogs and I had it in my landscaping all over the yard!
I’d consider moving, I’d be changing foods to the highest grade available and I’d be eliminating all toxins possible as well as getting away from carpet or any surfaces, detergents, etc, that could potentially have allergens or irritants.
I’d have this dog on a very simple, very high quality diet, keep it’s bedding and environment very clean using natural products and detergents.
I’d also be researching supplements. One thing you can do right now that won’t fix the problem but will help support the immune system is give your dog a teaspoon of coconut oil (human food grade, preferably organic) with every meal. Don’t give too much or it will soften the stool. Vitamin E also, talk to your vet about dosage.
No one here can diagnose your dog, you need a vet. If you haven’t already seen a vet dermatologist that would be your next appt.
Sometimes the vets can’t figure things out and it’s the vigilant owner. One of my dogs gets overwhelmed by a normal fungus that all dogs have a little of on their skin / fur. It makes her itchy and causes her to shed a lot when it’s getting active. I chased this for four years with three different vets, it would come and go and when it got bad she’d spend the nights chewing the fur (not the skin) off her paws and legs. I was told to use special shampoos, lotions, low doses of benadry. One vet stopped me while I was describing the symptoms and said “your dog has environmental alllergies, get used to it, it will get worse, hopefully she won’t end up as one of those bald old dogs and the only way to fix it is to move to somewhere like Utah where there are less allergens”.
I kept thinking about it, reading, trying different things (holistic, natural, noninvasive things) and then one night when I was sleeping with my face buried in her shoulders I noticed an ever so faint mildewy smell. So faint I thought I was imagining it. A couple days later I was at my regular vet with my other dog and asked my vet if the skin thing we had discussed many times could be fungal, she said “of course”. I’m thinking “then WHY did we never treat for that?”. When I got home I started googling “fungal skin dogs” and found a shampoo called Malaseb which is antibacterial and antifungal. This $16 bottle of shampoo solved the problem, when she starts to get itchy I bath her with it, usually about once very three weeks or so.
I’m not saying that is the problem, but be persistent, keep trying to figure it out. I’d be googling for information AND for images, it’s amazing what I can find just by googling what I’m interested in, hitting the images button and searching for similar images.
Good luck, I hope you find a way to make your pup feel better.
And DEFINATELY see the vet again. Maybe another vet. And see the dermatologist.