Blisters on my boxer pup?

She is 5 1/2 mo. and has had a rough start due to the inhumane treatment from her breader. She had developed Blisters under her neck, chest and front legs. She will scratch and they ooze and bleed. My first thought was sarcoptic mange, but I dipped her last week and it is spreading. Any thoughts. I plan to take her to be checked after the weekend, but wish I could do something now.
It’s not like I’m waiting on purpose. I don’t get paid until saturdays, and my vet office isn’t open then.

Also, I used the treatment for sarcoptic mange in dogs found over the counter and followed the directions carefully.
OK got her in the vet today and I was right about the mange, just not the right kind of mange. She has “RED” mange and she got an infection on top of it from scratching. She’s on med’s and is scheduled for dips. Thank you all.

Not sure what you mean by “blisters”. It sounds like a skin infection perhaps. It’s best if your vet does a skin scrape to determine whether it is sarcoptes or demodectic mites. Treatment is different. Or, it could be a bad staph infection and might need antibiotic therapy. Meanwhile, you can bathe her in a gentle oatmeal shampoo made for dogs, using cool water. That might be soothing. Call your vet tomorrow and maybe they can recommend a safe antihistamine until you can get her in. Maybe they can see her before the weekend?