Good Afternoon and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
In most cases, these are staph infections
. The staph bacteria is noral flora on their skin and when the environment is right with moisture and warmth, these will over grow causing these bumps. They may also be Sebaceous Cysts that are infected this way. These are oil glands within the hair follicles that can become infected in this same way. You are doing all the right things by clipping the hair and using medicated shampoos but these instructions may help further:
Give your gal Benadryl at 1 mg per pound every 12 hrs for 10 days.
Apply Betadine to the areas that appear red or irritated every 8 hrs. Clip away all the hair in this area. This is a skin infection called a pyoderma caused by the irritation. These can both be purchased at the pharmacy over the counter.
Bath weekly with Malaseb or Dermaplex which will remove the scabs or flakes. This can be purchased at the pet store or online.
If this does not help, your vet will run further tests to see what else can help your sweet girl past this.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, ***** *****