Itching on legs. Kidney issue or what?

My mom is a diabetic and suffers from pain in knees and migraine and is undergoing a general treatment. Recently in march, in her regular 3 monthly test we found her creatinine level goes up to 1.36 and we were tensed. Our doctor suggested to have another test after a month and drink more water as he presumed it could be because of urine infection. Later in April we conducted the test again and the creatinine level was 1.23 and uric acid 6.4. She was also having itching on her leg and feet. But later again in June the report came clean, creatinine at 1.1 but uric acid 6.6. She's having so much of itching on her legs and redness and red/black patches on legs.. we don't know if it is because of kidney issue or what? Recently doctor also gave alegra for 3 days but still the itching and redness is there.. it is very bad when she works while standing and itching become very severe.. feet used to swell also but recently it is not.. pls help if anything to worry about. Reports attached..