My mother is 90 years old, is very fair, has had a lot of sun exposure over the years and many skin cancers. She had surgery for an aortic aneurism about 5 years ago, is also a smoker, and has impaired kidneys. She has a dreadful itchiness from her scalp, across her back, around her groin area and then down almost to her knees. We have seen 2 skin specialists and taken her off some of medicines to see if she was allergic to any of them with no results. The itchiness leaves no marks on her skin and she feels as though things are crawling inside her. We have tested for allergies, scabies, psoriasis, dermatitis etc to no avail. It is driving her nuts and she cannot sleep