I've had extreme itching and bruising from my knees up to my hips for 6 weeks. no rash, bumps or redness. i haven't changed dials and i am not allergi?

Itch and bruises: Extreme itching without a rash can be caused by dry skin, diabetes, prickly heat, hyperthyroidism, polycythemia(too many red blood cells) as well as other diseases like lymphoma. If the bruises are not from scratching, a bone marrow or hematologic disorder is suspected. Your physician should evaluate you and order appropriate tests and referrals to specialists may be advised.