can an itch be predictive?

I read an online article on psora, and this question came to my mind.

Can psora also manifest as a dry itch on the skin, where there is nothing noticeable on the surface, not even a redness?

I am asking this because a person known to me had been complaining of an itch on the skin just below the left shoulder blade. The area was rubbed, off and on, with natural oils (olive, mustard, etc.) for relief from the itchiness. No allopathic medicines were applied or eaten.

It now turns out – about a year later – that she has destructive lesions on the ends of the 4th and 5th ribs, a small soft internal growth in the same area, and some effusion either in the lung or in the pericardium. Could the extremely itchy skin, which lies above these internal problems, have been an indications of these things?

I am not a homeo professional, though I do take the medicines with great success.

Thank you.