9 years old female patient who have had a pruritic rash for three years.

She lives out in the bush and no one else in family has a similar rash. The rash is diffuse on face/neck/back/arms/legs and it shows rough papular patches.

Some are linear in areas where it looks like she scratches.  The people who sent the case don’t have access to biopsy and they had limited treatment options available.

What is the most probable diagnosis? What is your most likely option for treatment?