@pranny welcome to Mayo Clinic Connect. I have Stage 3 CKD my father-in-law got to end stage renal disease. We both had itchy troubles at times. But it could have been due to something else other than our kidney conditions.
Members here have given many helpful suggestions that have helped them. I switched to hygiene products, laundry & cleaning supplies that were fragrance free and hypoallergenic. My husband has very sensitive skin and allergies. He gets rashes from lots of things. So my solution was good for both of us. My father-in-law tried lotions & creams to apply to his itchy areas. The name Eucerin (spelling?) comes to mind.