Thanks for writing in.
It can be urticaria
For correct diagnosis the images of the lesions and more info like duration,presence or absence of other lesions would be needed.
She can apply calamine
lotion over the affected area and take Tab zyrtec for itching.
For scabies treatment would be permethrin lotion over the affected area.
I encourage you to visit a qualified dermatologist
for proper diagnosis and treatment.
Hope this helps.