My skin suddenly began itching out of nowhere and the itching is almost unbearable. However, if I itch them, the area sort of darkens and/or reddens and a scab forms. It looks horrid and I have no idea what it is and is mostly on my chest, arms and back. It can t be a bug bite because the home has been checked for them. It s persisted for two weeks now, and it s becoming more frequent, and creams do not help it. What could it possibly be?