The color ultrasound of the urinary system can not check cystitis, the color ultrasound of the urinary system is only to check the shape of the bladder, the presence of mucosal tumors or stones in the bladder, and inflammation manifestation of the bladder wall manifestation is not smooth. However, in the urine holding state ultrasound can not clearly distinguish whether the bladder wall is the existence of erosion, roughness, etc., so it can not check cystitis, you need to carry out routine urine, urine culture examination or cystoscopy to clearly observe whether there is a manifestation of mucosal inflammation. Ultrasound of the urinary system is a common screening test, if the screening test reveals problems, further CT, cystoscopy and other tests are needed. Ultrasound of the urinary system mainly examines the bladder from the morphology to check whether the bladder is intact, whether there are lesions such as bladder diverticulum, bladder tumor, bladder stone, bladder atrial trabecular protrusion, etc., but it can’t observe the acute inflammatory stage. If there are secondary changes in the chronic inflammatory phase, such as significant thickening of the bladder wall can be examined by color ultrasound, but it is not certain that it is definitely caused by cystitis.