, I am sorry to hear about Pip's skin problem. I am a veterinarian, and will do my best to help.
It is hard to make a diagnosis without being able to see her, and check some things under a microscope, but this sounds like she might have a yeast infection in her ears and skin. Yeast skin infections turn the skin dark and are itchy. Cockers, with their heavy ears, are prone to ear infections with yeast and bacteria.
If it is a yeast infection, it is secondary to some other problem, usually an allergy to food, or to something in the environment. If you only treat the yeast infection, it will keep coming back until the underlying allergic skin disease is also treated.
If she were mine, I would start with doing skin scrapings, and looking at skin cells and hair follicles under a microscope, looking , bacteria, and yeast.
If it appears to be a yeast infection, I would treat with frequent baths in an anti yeast shampoo like Ketochlor. I would treat the itching with antihistamines, fish oil, and possible a change in diet.
If the antihistamines like Benadryl or Claritin ( I can give you dosages if you tell me her weight) do not control her scratching and itching, she may need prescription itch medication.
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so realy i should take her to a vet it sounds complicated i am new to this never had a pet before
Cockers, as a breed, are prone to skin allergies. Working with a vet is best.
Over the counter medications may not be enough. Usually prescription ear drops, shampoos, and medication are needed.
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Is there anything else I can answer, or help with?