Hi there, Thanks for writing in. It is quite possible that you could be allergic to the mattress. Try sleeping on the couch or on a thick blanket placed on the floor. See if the itching persists. Another possibility is allergy to the detergents etc. In view of your frequent urination, I would like to have some additional information : Any fever, burning urination , lower abdominal pain, nausea etc? If one or more symptoms are present, it could point to a urinary tract infection, in which case you would need get a urine routine test done and depending on the results , further treatment. Also it would be worthwhile to get Renal function tests done ( Blood urea, Serum creatinine etc) In view of your age , I would also advise you to get your blood sugar levels checked (fasting blood sugar and post prandial blood sugars). I have suggested the above investigations to rule out diabetes, kidney disease and urinary tract infection as increased urination and itching might be explained by the above conditions. Hope this helps. Do get back to me if you have any further queries. Regards, Dr. Divya Kuttikrishnan