I have seen a dermatologist, and they are the one's who said that there is no cure. They had mentioned a name like, theresphaltic skin disorder, which according to them has no cure
Hello,
I cannot confirm anything without examination but such an itchy patch can be due to dermatitis, psoriasis, eczema, dermatomyositis or confluent and reticulated papillomatosis. To confirm the diagnosis, I suggest you to get it evaluated from a dermatologist and get a biopsy skin done.
I hope it helps. Take care and regards.