From the description you have given, your daughter is either having seborrheic dermatitis
or may be psoriasis
. As she is just using shampoos, that is why she is not having good treatment response. She needs to use oral antibiotics
along with oral drugs meant specifically for seborrheic dermatitis or psoriasis. Kindly consult a dermatologist
so that her scalp can be examined and further treatment planned likewise. Take care.