can be the first possibility. It is a parasite infection which usually presents with intense itching and mite burrows in the area of the hands, feet, wrists, elbows, back, buttocks, and external genitals (labia and perineum
This itching worsens usually at night and there is history of other family members also being affected.
For the treatment of this you need to consult a dermatologist
to confirm the diagnosis of scabies by naked eye examination of itchy lesions.
The other possibility can be a dry scaly skin. Use of calamine
lotion will help relieve this.
Also fungal infections can be very itchy. In the vagina they usually present with curdy white discharge, itching and redness