Hypoechoic bladder nodule is an abnormal ultrasound sign, which is mostly seen in patients with tumor in the bladder, clot in the bladder and deposit in the bladder. 1. Tumor in the bladder: the ultrasound signs of these patients are mostly hypoechoic masses with irregular morphology, cauliflower shape, blood perfusion at the base, and inability to move when changing positions. 2. Clots in the bladder: If there are clots in the bladder, the ultrasound signs usually show hypoechoic masses, which can be moved in different positions. 3. Deposits in the bladder: the ultrasound sign of this type of patient is often characterized by a sediment-like hypoechoic pattern, which can be shifted in different positions. Therefore, individual ultrasound signs cannot confirm the diagnosis of the disease, patients should also go to the hospital for further relevant examinations to clarify the condition and timely treatment.