Scratching of feet due to never-ending itching (3)

Description: Today i had to be on a sofa scratching my feet for the whole afternoon and while i was walking around the house with my bare feet i got a very big itch and i still can't explain why, however i immediately got on the sofa to be more comfortable and using my fingernails i scratched my feet as well as the soles of my feet and legs trying to minimize the itch but without success