Hi Dear
Welcome to the platform of Health care magic,
As you have narrated in the history it appears to be some allergic rashes like
Urticaria she is developing off and on.
It requirs local examination by
Dermatologist to make the onsight diagnosis.
He may advice for some Blood investigation like Absolute
Eosinophil counts ,stool examination for ova and cysts to rule out worm infestation.
She may require some deworming agent, and anti allergic medication for some time.
Some diatery changes may be required.
Some allergen like some clothes, perfumes, tinned food, food like toffees,jellys with some preservatives etc may be avoided.
Hope your query is answered.
Thanks