If there is a lesion in the small intestine area or in a part of the bowel closer to the bladder, it may affect the bladder. If there are lesions in the sigmoid colon or rectum, they can also affect the bladder, resulting in symptoms such as urinary urgency and painful urination. For these two parts of the lesion causes are more, one of the more common is hemorrhoids, rectal cancer or ulcerative colitis, once these diseases appear, the urinary system will appear obvious symptoms, there are certain pressure reactions can go to the anorectal surgery to do the rectal aspects of the diagnosis, and then do colonoscopy for diagnosis. If you find that you suddenly have frequent urination, urgent urination or other symptoms of the urinary system, it is best to pay attention to them and not delay the best time for treatment.