Kidney cysts can cause blood in urine for the following reasons: First, rupture of kidney cysts can cause symptoms such as redness in urine, and checking urine routine shows that there are red cells in urine, which is usually treated by giving hemostatic drugs such as hemostatic minerals and hemostatic fangic acid, and blood in urine can disappear after treatment. Kidney cyst can cause urinary stones, such as ureteral stones can cause red urine, urinary frequency, urinary urgency, urinary pain, lumbar pain and other symptoms, then you can give extracorporeal shock wave lithotripsy or Chinese medicine lithotripsy treatment, the blood in urine will disappear naturally after the treatment of stone discharge. Third, infection, kidney cyst can cause urinary tract infection such as pyelonephritis, cystitis, etc. Patients with infection can have symptoms such as red urine, frequent urination, urgent urination, painful urination, etc. At this time, anti-infection treatment can be given, such as the application of levofloxacin dispersible tablets and other drugs for treatment, the blood in urine will disappear naturally after the elimination of inflammation.