Why Is My Skin Itchy ? Started With Soles Of

Why is my skin itchy ? Started with soles of feet and now just various spots on body . When I itch I can see hives which look like mosquito bites more or less and raised scratch marks usually helps the itch to stop when I put something cold on it. Don't know if it's stress or have a cat living in my house when an around cats was fine but mayb cause cat loves with me??