The rectovesical depression is not a disease state but a normal male physiologic anatomy, a deep fossa formed by the peritoneum between the rectum and the bladder, about 7 cm from the anus. This depression is located in the lower position of the pelvis, some diseases caused by abdominal fluid, pus, blood, etc. will be with the position change and gravity convergence to this depression. Its clinical significance is basically the same as the rectal uterine depression in women. Clinically, it can be punctured through the anterior wall of the rectum to obtain fluid for laboratory examination, to further clarify the nature of the fluid to assist in the diagnosis, or through the anterior wall of the rectum to incise and drain the fluid. Rectal bladder depression fluid can be caused by pelvic malignant tumors, traumatic blood and fluid accumulation, pelvic inflammation and other diseases. Of course, normal men can also have a small amount of physiological fluid every day, usually no more than 50ml. If the examination suggests that there is a lesion in the rectal bladder depression, you should go to the hospital in time for a clear diagnosis and active treatment.