What is causing urin to be blury?

See below. If you mean your urine is not clear, there can be many reasons like infection etc. Get a urine analysis if it is persistant.
?Cloudy ?urinalysis. If you mean cloudy: most common cause is harmless sediment such as phosphate or urate crystals. Next wouyld be cloudy from infection, which if present would probably be associated with symptoms of burning or frequent urination. Then, if bluryness is caused by blood, might be more serious. So please get a urinalysis.
Blury urine. If blurry means red then you need to see a doctor for evaluation for possible infx, cancer, other issues...