Hi,
How are you and your family? Are there other symptoms present? If members of the family have this itching, the chances of an infectious condition is high. This could be due to insect bites, mites, bedbugs and as brandy mentioned, scabies. It is best that you have this checked for proper evalaution. treatment will depend on the underlying cause. Take care and do keep us posted.
sounds like scabies, you cant see them.