Brief Answer:
It is called pruritis and has many reasons that may cause this!!!

Detailed Answer:
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I have thoroughly reviewed health query you raised, and well realize all of those concerns. Being your physician, I will take care all of them today and will extend my expertise to solve the problems.

I feel sorry for the issue your granddaughter has. It can be due to any of the many reason. It can be:
Dry skin (XEROSIS) is very common nowadays in this season.
Hives that are sudden rashes and itching on the skin that drives the person to scratch.
Can be any medication induced skin issue.
Eczema.
Lice, scabies, chickenpox or Psoriasis are some skin issues causing these symptoms.
Contact dermatitis usually caused by irritation or allergy due to anything coming in contact to the skin. The skin is actually allergic to that specific irritant. Wool, chemicals, soaps, perfumes, poison ivy and cosmetics can do this.
Food allergy is also a cause.
Thyroid diseases, liver disease, celiac disease--wheat intolerance and pruritis.
Impetigo is a bacterial infection of skin causing rash and an urge to scratch.
Some blood disorders also cause skin irritations and itching that leads to rashes.

Try to make an appointment with a Dermatologist as soon as possible and if you are unable to get an early appointment, kindly take her to the Emergency Room as this is very important to be seen by a specialist. You are already doing all possible over the counter remedies that are not curing it. It means this is something to be taken care of by a Specialist. He will run a battery of tests on her including the blood work and skin diagnostics. Then after diagnosis he will be able to treat her.

Hope I addressed all the concerns you have. Let me know if you have further questions. I will be more than happy to clear any doubts. Please give your 'rating' (if agreed, Five Stars) to help me assist patients in a better way; and, please don't forget to click on 'Close The Discussion'.
For any disease you have, a timely follow-up is necessary regarding the treatment efficacy and to see if there is a need to change treatment options. So keep a follow up to see how you doing (Always write down my name in start of your questions at this forum & I will be with you in no time).


Regards!
DR. HANIF
USA

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