The symptoms of bladder congestion are usually secondary to diffuse cystitis, which can occur: 1. urinary tract irritation, due to extensive congestion of the bladder mucosa, urine irritation and localized stinging pain or with frequent urination, urinary urgency, painful urination with a sense of incomplete urination, etc. 2. can appear in the flesh hematuria, extensive bladder congestion, bruising can lead to a small number of red blood cells seeping into the urine, which can appear red urine, manifesting as a wash water-like or light red. 3. 3. bladder congestion can cause cramping and discomfort in the lower abdomen, especially after urination. 4. bladder congestion can cause chronic pelvic pain, which is aggravated by physical activity and can be slightly alleviated after lying down at rest. 5. bladder congestion can further cause upper urinary tract symptoms, such as edema caused by congestion, which can lead to relative narrowing of the ureteral orifice and mild hydronephrosis. Mild hydronephrosis of the renal pelvis occurs, and patients show discomfort such as bilateral back pain or soreness and distension of the lower back.