A subfilled bladder with no significant abnormal echoes seen within it is an imaging description of bladder ultrasound and is not meant to be a disease. Before a bladder ultrasound is performed, the subject is usually asked to drink and hold their urine to facilitate the examination. Underfilling of the bladder is usually due to insufficient urine volume in the bladder, resulting in underfilling of the bladder; the absence of obvious abnormal echoes suggests that the bladder is basically normal, but the presence of bladder stones, bladder tumors, and other abnormal occupations usually suggests the presence of abnormal echoes. Therefore, this imaging description suggests that the bladder is essentially normal, and is not indicative of a disease. However, there are limitations in ultrasound examination. If there are clinical symptoms and no obvious abnormality in ultrasound, further examination such as CT or MRI is required. It is recommended to go to a regular hospital for ultrasound examination of the bladder, and if there is any abnormality, consult a doctor for treatment promptly.