How do i know if i have Pruritus? My legs itch like crazy but there's not rash? Do you think i have it?

SO my legs( thighs and calves), and the creases of my knees itch likt crazy. i'm scratching them almost to the point of bleeding....Do you think i have pruritus? How do i know? I'm in chlorine alot, and everytime i get out of the water, my skins itch? IDK what to do? what do you tink?